coronary artery disease

Coronary Artery Disease 

Definition

Coronary artery disease is a narrowing or blockage of the arteries and vessels that provide oxygen and nutrients to the heart. It is caused by atherosclerosis, an accumulation of fatty materials on the inner linings of arteries. The resulting blockage restricts blood flow to the heart. When the blood flow is completely cut off, the result is a heart attack.

Description

Coronary artery disease, also called coronary heart disease or heart disease, is the leading cause of death for both men and women in the United States. According to the American Heart Association, deaths from coronary artery disease have declined some since about 1990, but more than 40,000 people still died from the disease in 2000. About 13 million Americans have active symptoms of coronary artery disease.

Coronary artery disease occurs when the coronary arteries become partially blocked or clogged. This blockage limits the flow of blood from the coronary arteries, which are the major arteries supplying oxygen-rich blood to the heart. The coronary arteries expand when the heart is working harder and needs more oxygen. Arteries expand, for example, when a person is climbing stairs, exercising, or having sex. If the arteries are unable to expand, the heart is deprived of oxygen (myocardial ischemia). When the blockage is limited, chest pain or pressure, called angina, may occur. When the blockage cuts off the flow of blood, the result is heart attack (myocardial infarction or heart muscle death).

Healthy coronary arteries are clean, smooth, and slick. The artery walls are flexible and can expand to let more blood through when the heart needs to work harder. The disease process in arteries is thought to begin with an injury to the linings and walls of the arteries. This injury makes them susceptible to atherosclerosis and blood clots (thrombosis).

Causes and symptoms

Coronary artery disease is usually caused by atherosclerosis. Cholesterol and other fatty substances accumulate on the inner wall of the arteries. They attract fibrous tissue, blood components, and calcium, and harden into artery-clogging plaques. Atherosclerotic plaques often form blood clots that also can block the coronary arteries (coronary thrombosis). Congenital defects and muscle spasms can also block blood flow. Recent research indicates that infection from organisms such as chlamydia bacteria may be responsible for some cases of coronary artery disease.

A number of major contributing factors increase the risk of developing coronary artery disease. Some of these can be changed and some cannot. People with more risk factors are more likely to develop coronary artery disease.

Major risk factors

Major risk factors significantly increase the chance of developing coronary artery disease. Those that cannot be changed are:

• Heredity—People whose parents have coronary artery disease are more likely to develop it. African Americans also are at increased risk because they experience a higher rate of severe hypertension than whites.
• Sex—Men are more likely to have heart attacks than women and to have them at a younger age. Over age 60, however, women have coronary artery disease at a rate equal to that of men.
• Age—Men who are 45 years of age and older and women who are 55 years of age and older are more likely to have coronary artery disease. Occasionally, coronary disease may strike a person in the 30s. Older people (those over 65) are more likely to die of a heart attack. Older women are twice as likely as older men to die within a few weeks of a heart attack.

Major risk factors that can be changed are:

• Smoking—Smoking increases both the chance of developing coronary artery disease and the chance of dying from it. Smokers are two to four times more likely than are non-smokers to die of sudden heart attack. They are more than twice as likely as non-smokers to have a heart attack. They also are more likely to die within an hour of a heart attack. Second hand smoke also may increase risk.
• High cholesterol—Dietary sources of cholesterol are meat, eggs, and other animal products. The body also produces it. Age, sex, heredity, and diet affect one's blood cholesterol. Total blood cholesterol is considered high at levels above 240 mg/dL and borderline at 200-239 mg/dL. High-risk levels of low-density lipoprotein (LDL cholesterol) begin at 130-159 mg/dL, depending on other risk factors. Risk of developing coronary artery disease increases steadily as blood cholesterol levels increase above 160 mg/dL. When a person has other risk factors, the risk multiplies.
• High blood pressure—High blood pressure makes the heart work harder and weakens it over time. It increases the risk of heart attack, stroke, kidney failure, and congestive heart failure. A blood pressure of 140 over 90 or above is considered high. As the numbers rise, high blood pressure goes from Stage 1 (mild) to Stage 4 (very severe). In combination with obesity, smoking, high cholesterol, or diabetes, high blood pressure raises the risk of heart attack or stroke several times.
• Lack of physical activity—Lack of exercise increases the risk of coronary artery disease. Even modest physical activity, like walking, is beneficial if done regularly.
• Diabetes mellitus—The risk of developing coronary artery disease is seriously increased for diabetics. More than 80% of diabetics die of some type of heart or blood vessel disease.

Contributing risk factors

Contributing risk factors have been linked to coronary artery disease, but the degree of their significance is not known yet. Contributing risk factors are:

• Hormone replacement therapy—Evidence from a large trial called the Women's Health Initiative released in 2002 and 2003 found that hormone replacement therapy is a risk factor for coronary artery disease in postmenopausal women. The therapy was once thought to help protect women against heart disease, but in the trial, it was discovered that it was harmful to women with existing coronary artery disease.
• Obesity—Excess weight increases the strain on the heart and increases the risk of developing coronary artery disease even if no other risk factors are present. Obesity increases blood pressure and blood cholesterol and can lead to diabetes.
• Stress and anger—Some scientists believe that stress and anger can contribute to the development of coronary artery disease and increase the blood's tendency to form clots (thrombosis). Stress, the mental and physical reaction to life's irritations and challenges, increases the heart rate and blood pressure and can injure the lining of the arteries. Evidence shows that anger increases the risk of dying from heart disease. The risk of heart attack is more than double after an episode of anger.

Chest pain (angina) is the main symptom of coronary heart disease but it is not always present. Other symptoms include shortness of breath, and chest heaviness, tightness, pain, a burning sensation, squeezing, or pressure either behind the breastbone or in the arms, neck, or jaws. Many people have no symptoms of coronary artery disease before having a heart attack; 63% of women and 48% of men who died suddenly of coronary artery disease had no previous symptoms of the disease, according to the American Heart Association.

Diagnosis

Diagnosis begins with a visit to the physician, who will take a medical history, discuss symptoms, listen to the heart, and perform basic screening tests. These tests will measure weight, blood pressure, blood lipid levels, and fasting blood glucose levels. Other diagnostic tests include resting and exercise electrocardiogram, echocardiography, radionuclide scans, and coronary angiography. The treadmill exercise (stress) test is an appropriate screening test for those with high risk factors even when they feel well.

An electrocardiogram (ECG) shows the heart's activity and may reveal a lack of oxygen (ischemia). Electrodes covered with conducting jelly are placed on the patient's chest, arms, and legs. They send impulses of the heart's activity through an oscilloscope (a monitor) to a recorder that traces them on paper. The test takes about 10 minutes and is performed in a physician's office. A definite diagnosis cannot be made from electrocardiography. About 50% of patients with significant coronary artery disease have normal resting electrocardiograms. Another type of electrocardiogram, known as the exercise stress test, measures how the heart and blood vessels respond to exertion when the patient is exercising on a treadmill or a stationary bike. This test is performed in a physician's office or an exercise laboratory. It takes 15-30 minutes. It is not perfectly accurate. It sometimes gives a normal reading when the patient has a heart problem or an abnormal reading when the patient does not.

If the electrocardiogram reveals a problem or is inconclusive, the next step is exercise echocardiography or nuclear scanning (angiography). Echocardiography, cardiac ultrasound, uses sound waves to create an image of the heart's chambers and valves. A technologist applies gel to a hand-held transducer, then presses it against the patient's chest. The heart's sound waves are converted into an image that can be displayed on a monitor. It does not reveal the coronary arteries themselves, but can detect abnormalities in heart wall motion caused by coronary disease. Performed in a cardiology outpatient diagnostic laboratory, the test takes 30-60 minutes.

Radionuclide angiography enables physicians to see the blood flow of the coronary arteries. Nuclear scans are performed by injecting a small amount of radiopharmaceutical such as thallium into the bloodstream. A device that uses gamma rays to produce an image of the radioactive material (gamma camera) records pictures of the heart. Radionuclide scans are not dangerous. The radiation exposure is about the same as that in a chest x ray. The tiny amount of radioactive material used disappears from the body in a few days. Radionuclide scans cost about four times as much as exercise stress tests but provide more information.

In radionuclide angiography, a scanning camera passes back and forth over the patient who lies on a table. Radionuclide angiography is usually performed in a hospital's nuclear medicine department and takes 30-60 minutes. Thallium scanning usually is done in conjunction with an exercise stress test. When the stress test is finished, thallium or sestamibi is injected. The patient resumes exercise for one minute to absorb the thallium. For patients who cannot exercise, cardiac blood flow and heart rate may be increased by intravenous dipyridamole (Persantine) or adenosine. Thallium scanning is done twice, immediately after injecting the radiopharmaceutical and again four hours (and maybe 24 hours) later. It is usually performed in a hospital's nuclear medicine department. Each scan takes 30-60 minutes.

Coronary angiography is the most accurate method for making a diagnosis of coronary artery disease, but it also is the most invasive. It is a form of cardiac catheterization that shows the heart's chambers, great vessels, and coronary arteries using x-ray technology. During coronary angiography the patient is awake but sedated. ECG electrodes are placed on the patient's chest and an intravenous line is inserted. A local anesthetic is injected into the site where the catheter will be inserted. The cardiologist inserts a catheter into a blood vessel and guides it into the heart. A contrast dye is injected to make the heart visible on x-ray cinematography. Coronary angiography is performed in a cardiac catheterization laboratory either in an outpatient or inpatient surgery unit. It takes from 30 minutes to two hours.

Treatment

Coronary artery disease can be treated many ways. The choice of treatment depends on the severity of the disease. Treatments include lifestyle changes and drug therapy, percutaneous transluminal coronary angioplasty, and coronary artery bypass surgery. Coronary artery disease is a chronic disease requiring lifelong care. Angioplasty or bypass surgery is not a cure.

People with less severe coronary artery disease may gain adequate control through lifestyle changes and drug therapy. Many of the lifestyle changes that prevent disease progression—a low-fat, low-cholesterol diet, weight loss if needed, exercise, and not smoking—also help prevent the disease from developing.

Drugs such as nitrates, beta-blockers, and calcium-channel blockers relieve chest pain and complications of coronary artery disease, but they cannot clear blocked arteries. Nitrates (nitroglycerin) improve blood flow to the heart. Beta-blockers (acebutelol, propranolol) reduce the amount of oxygen required by the heart during stress. One type of calcium-channel blocker (verapamil, diltiazem hydrochloride) helps keep the arteries open and reduces blood pressure. Aspirin helps prevent blood clots from forming on plaques, reducing the likelihood of a heart attack. Cholesterol-lowering medications are also indicated in most cases.

Percutaneous transluminal coronary angioplasty and bypass surgery are procedures that enter the body (invasive procedures) to improve blood flow in the coronary arteries. Percutaneous transluminal coronary angioplasty, usually called coronary angioplasty, is a non-surgical procedure. A catheter tipped with a balloon is threaded from a blood vessel in the thigh into the blocked artery. The balloon is inflated, compressing the plaque to enlarge the blood vessel and open the blocked artery. The balloon is deflated, and the catheter is removed. Coronary angioplasty is performed in a hospital and generally requires a stay of one or two days. Coronary angioplasty is successful about 90% of the time, but for one-third of patients, the artery narrows again within six months. The procedure can be repeated. It is less invasive and less expensive than coronary artery bypass surgery.

In coronary artery bypass surgery, a healthy artery or vein from an arm, leg, or chest wall is used to build a detour around the coronary artery blockage. The healthy vessel then supplies oxygen-rich blood to the heart. Bypass surgery is major surgery. It is appropriate for those patients with blockages in two or three major coronary arteries, those with severely narrowed left main coronary arteries, and those who have not responded to other treatments. It is performed in a hospital under general anesthesia. A heart-lung machine is used to support the patient while the healthy vein or artery is attached past the blockage to the coronary artery. About 70% of patients who have bypass surgery experience full relief from angina; about 20% experience partial relief. Only about 3-4% of patients per year experience a return of symptoms. Survival rates after bypass surgery decrease over time. At five years after surgery, survival expectancy is 90%; at 10 years about 80%, at 15 years about 55%, and at 20 years about 40%.

Various semi-experimental surgical procedures for unblocking coronary arteries are currently being studied. Atherectomy is a procedure in which the surgeon shaves off and removes strips of plaque from the blocked artery. In laser angioplasty, a catheter with a laser tip is inserted into the affected artery to burn or break down the plaque. A metal coil called a stent can be implanted permanently to keep a blocked artery open. Stenting is becoming more common.

Alternative treatment

Natural therapies may reduce the risk of certain types of heart disease, but once symptoms appear, conventional medical attention is necessary. A healthy diet (including cold-water fish as a source of essential fatty acids) and exercise, important components of conventional prevention and treatment strategies, also are emphasized in alternative approaches to coronary artery disease. Herbal medicine offers a variety of remedies that may have a beneficial effect on coronary artery disease. For example, ginger (Zingiber officinale) may help reduce cholesterol. Garlic (Allium sativum), ginger, and hot red or chili peppers all are circulatory enhancers that can help prevent blood clots. Yoga and other bodywork, massage, relaxation therapies, and talking therapies also may help prevent coronary artery disease and stop, or even reverse, the progression of atherosclerosis. Vitamin and mineral therapy to reduce, reverse, or protect against coronary artery disease include chromium; calcium and magnesium; B-complex vitamins; the antioxidant vitamins C and E; selenium; and zinc. Traditional Chinese medicine may recommend herbal remedies, massage, acupuncture, and dietary modification. However, studies released in 2003 showed that vitamins C and E fell short of claims that they helped narrow blockage caused by coronary artery disease. In fact, high doses of the vitamins should be avoided.

Prognosis

In many cases, coronary artery disease can be successfully treated. Advances in medicine and healthier lifestyles have caused a substantial decline in death rates from coronary artery disease since the mid-1980s. New diagnostic techniques enable doctors to identify and treat coronary artery disease in its earliest stages. New technologies and surgical procedures have extended the lives of many patients who would otherwise have died. Research on coronary artery disease continues.

Prevention

A healthy lifestyle can help prevent coronary artery disease and help keep it from progressing. A heart-healthy lifestyle includes eating right, regular exercise, maintaining a healthy weight, no smoking, moderate drinking, no recreational drugs, controlling hypertension, and managing stress. Cardiac rehabilitation programs are excellent to help prevent recurring coronary problems for people who are at risk and who have had coronary events and procedures.

Eating right

A healthy diet includes a variety of foods that are low in fat, especially saturated fat, low in cholesterol, and high in fiber. It includes plenty of fruits and vegetables, nuts and whole grains, and limited sodium. Some foods are low in fat but high in cholesterol and some are low in cholesterol but high in fat. Saturated fat raises cholesterol and, in excessive amounts, increases the amount of the clot-forming proteins in blood. Polyunsaturated and monounsaturated fats are good for the heart. Fat should comprise no more than 30% of total daily calories.

Cholesterol, a waxy substance containing fats, is found in foods such as meat, eggs, and other animal products. It also is produced in the liver. Soluble fiber can help lower cholesterol. Dietary cholesterol should be limited to about 300 milligrams per day. Many popular lipid-lowering drugs can reduce LDL cholesterol by an average of 25-30% when used with a low-fat, low-cholesterol diet.

Fruits and vegetables are rich in fiber, vitamins, and minerals. They are low calorie and nearly fat free. Vitamin C and beta-carotene, found in many fruits and vegetables, keep LDL cholesterol from turning into a form that damages coronary arteries.

Excess sodium can increase the risk of high blood pressure. Many processed foods contain large amounts of sodium. Daily intake should be limited to about 2,400 milligrams, about the amount in a teaspoon of salt.

The "Food Guide" Pyramid developed by the U.S. Departments of Agriculture and Health and Human Services provides easy-to-follow guidelines for daily heart-healthy eating. It recommends 6 to 11 servings of bread, cereal, rice, and pasta; three to five servings of vegetables; two to four servings of fruit; two to three servings of milk, yogurt, and cheese; and two to three servings of meat, poultry, fish, dry beans, eggs, and nuts. Fats, oils, and sweets should be used sparingly. Canola and olive oil are better for the heart than other cooking oils. Coronary patients should be on a strict diet. In 2003, the American Heart Association advised a diet rish in fatty fish such as salmon, herring, trout, or sardines. If people cannot eat daily servings of these fish, the association recommends three fish oil capsules per day.

Regular exercise

Aerobic exercise can lower blood pressure, help control weight, and increase HDL ("good") cholesterol. It may keep the blood vessels more flexible. The Centers for Disease Control and Prevention and the American College of Sports Medicine recommend moderate to intense aerobic exercise lasting about 30 minutes four or more times per week for maximum heart health. Three 10-minute exercise periods also are beneficial. Aerobic exercise—activities such as walking, jogging, and cycling—uses the large muscle groups and forces the body to use oxygen more efficiently. It also can include everyday activities such as active gardening, climbing stairs, or brisk housework. People with coronary artery disease or risk factors should consult a doctor before beginning an exercise program.

Maintaining a desirable body weight

About one-fourth of all Americans are overweight and nearly one-tenth are obese, according to the Surgeon General's Report on Nutrition and Health. People who are 20% or more over their ideal body weight have an increased risk of developing coronary artery disease. Losing weight can help reduce total and LDL cholesterol, reduce triglycerides, and boost HDL cholesterol. It also may reduce blood pressure. Eating right and exercising are two key components of losing weight.

Avoiding recreational drugs

Smoking has many adverse effects on the heart. It increases the heart rate, constricts major arteries, and can create irregular heartbeats. It raises blood pressure, contributes to the development of plaque, increases the formation of blood clots, and causes blood platelets to cluster and impede blood flow. Heart damage caused by smoking can be repaired by quitting. Even heavy smokers can return to heart health. Several studies have shown that ex-smokers face the same risk of heart disease as non-smokers within five to 10 years after quitting.

Drink in moderation. Modest consumption of alcohol may actually protect against coronary artery disease because alcohol appears to raise levels of HDL cholesterol. The American Heart Association defines moderate consumption as one ounce of alcohol per day, roughly one cocktail, one 8-ounce glass of wine, or two 12-ounce glasses of beer. However, even moderate drinking can increase risk factors for heart disease for some people (by raising blood pressure, for example). Excessive drinking always is bad for the heart. It usually raises blood pressure and can poison the heart and cause abnormal heart rhythms or even heart failure.

Do not use other recreational drugs. Commonly used recreational drugs, particularly cocaine and "crack," can seriously harm the heart and should never be used.

Seeking treatment for hypertension

High blood pressure, one of the most common and serious risk factors for coronary artery disease, can be controlled completely through lifestyle changes and medication. Moderate hypertension can be controlled by reducing dietary intake of sodium and fat, exercising regularly, managing stress, abstaining from smoking, and drinking alcohol in moderation. People for whom these changes do not work or people with severe hypertension may be helped by many categories of medication.

Key terms

Angina — Chest pain that happens when diseased blood vessels restrict the flow of blood to the heart. Angina often is the first symptom of coronary artery disease.

Atherosclerosis — A process in which the walls of the coronary arteries thicken due to the accumulation of plaque in the blood vessels. Atherosclerosis is the cause of coronary artery disease.

Beta-blocker — A drug that blocks some of the effects of fight-or-flight hormone adrenaline (epinephrine and norepinephrine), slowing the heart rate and lowering the blood pressure.

Calcium-channel blocker — A drug that blocks the entry of calcium into the muscle cells of small blood vessels (arterioles) and keeps them from narrowing.

Coronary arteries — The main arteries that provide blood to the heart. The coronary arteries surround the heart like a crown, coming out of the aorta, arching down over the top of the heart, and dividing into two branches. These are the arteries in which coronary artery disease occurs.

HDL cholesterol — High-density lipoprotein cholesterol is a component of cholesterol that helps protect against heart disease. HDL is nicknamed "good" cholesterol

LDL cholesterol — Low-density lipoprotein cholesterol is the primary cholesterol molecule. High levels of LDL increase the risk of coronary heart disease. LDL is nicknamed "bad" cholesterol.

Plaque — A deposit of fatty and other substances that accumulate in the lining of the artery wall.

Triglyceride — A fat that comes from food or is made from other energy sources in the body. Elevated triglyceride levels contribute to the development of atherosclerosis.

Managing stress

Everyone experiences stress. Stress sometimes can be avoided and when it is inevitable, it can be controlled. It is particularly important for those at risk for heart disease. A 2003 report showed that middle-aged men with high anxiety were less likely to adhere to heart healthy lifestyle practices. Techniques for controlling stress include: taking life more slowly, spending more time with family and friends, thinking positively, getting enough sleep, exercising, and practicing relaxation techniques.

Resources

Books

Notelovitz, Morris, and Diana Tonnessen. The Essential Heart Book for Women. New York: St. Martin's Press, 1996.

Texas Heart Institute. "Coronary Artery Disease, Angina, and Heart Attacks." In Texas Heart Institute Heart Owner's Handbook. New York: JohnWiley & Sons, 1996.

Periodicals

"For Fighting Heart Disease, Vitamins C and E Fall Short." Tufts University Health and Nutrition Newsletter January 2003: 2.

Jancin, Bruce. "High Anxiety Level Predicts Heart-unhealthy Lifestyle." Internal Medicine News March 15, 2003: 25.

"Optimal Diets for Prevention of CHD." Clinical Cardiology Alert February 2003.

Wellbery, Caroline. "No HRT or Antioxidants in Women with Coronary Disease." American Family Physician March 15, 2003: 1371.

Zoler, Michael L. "Heart Association Advocates Fish Oil Supplements." Family Practice News January 15, 2003: 6.

Organizations

American Heart Association. 7320 Greenville Ave, Dallas, TX 75231. (214) 373-6300. http://www.americanheart.org.

National Heart, Lung and Blood Institute. P.O. Box 30105, Bethesda, MD 20824-0105. (301) 251-1222. http://www.nhlbi.nih.gov.

Texas Heart Institute. Heart Information Service. P.O. Box 20345, Houston, TX 77225-0345. http://www.tmc.edu/thi.

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disease /dis·ease/ (dĭ-zēz´) any deviation from or interruption of the normal structure or function of any body part, organ, or system that is manifested by a characteristic set of symptoms and signs and whose etiology, pathology, and prognosis may be known or unknown. See also entries under syndrome.

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acquired cystic disease of kidney  the development of cysts in the formerly noncystic failing kidney in end-stage renal disease.

Addison's disease  bronzelike pigmentation of the skin, severe prostration, progressive anemia, low blood pressure, diarrhea, and digestive disturbance, due to adrenal hypofunction.

Albers-Schönberg disease  osteopetrosis.

allogeneic disease  graft-versus-host reaction occurring in immunosuppressed animals receiving injections of allogeneic lymphocytes.

Alpers' disease  a rare disease of young children, characterized by neuronal deterioration of the cerebral cortex and elsewhere, progressive mental deterioration, motor disturbances, seizures, and early death.

alpha chain disease  heavy chain disease characterized by plasma cell infiltration of the lamina propria of the small intestine resulting in malabsorption with diarrhea, abdominal pain, and weight loss, possibly accompanied by pulmonary involvement.

Alzheimer's disease  progressive degenerative disease of the brain, of unknown cause; characterized by diffuse atrophy throughout the cerebral cortex with distinctive histopathological changes.

Andersen's disease  glycogen storage d., type IV.

apatite deposition disease  a connective tissue disorder marked by deposition of hydroxyapatite crystals in one or more joints or bursae.

Aran-Duchenne disease  spinal muscular atrophy.

arteriosclerotic cardiovascular disease  (ASCVD) atherosclerotic involvement of arteries to the heart and to other organs, resulting in debility or death; sometimes used specifically for ischemic heart disease.

arteriosclerotic heart disease  (ASHD) ischemic heart d.

autoimmune disease  any of a group of disorders in which tissue injury is associated with humoral or cell-mediated responses to the body's own constituents; they may be systemic or organ-specific.

Ayerza's disease  polycythemia vera with chronic cyanosis, dyspnea, bronchitis, bronchiectasis, hepatosplenomegaly, bone marrow hyperplasia, and pulmonary artery sclerosis.

Banti's disease  congestive splenomegaly.

Barlow disease  scurvy in infants.

Barraquer's disease  partial lipodystrophy.

Basedow's disease  Graves' d.

Batten disease , Batten-Mayou disease

1. Vogt-Spielmeyer d.

2. more generally, any or all of the group of disorders constituting neuronal ceroid lipofuscinosis.

Bayle's disease  general paresis.

Bazin's disease  erythema induratum.

Bekhterev's (Bechterew's) disease  ankylosing spondylitis.

Benson's disease  asteroid hyalosis.

Berger's disease  IgA glomerulonephritis.

Bernhardt's disease , Bernhardt-Roth disease meralgia paresthetica.

Besnier-Boeck disease  sarcoidosis.

Best's disease  congenital macular degeneration.

Bielschowsky-Janský disease  Janský-Bielschowsky d.

Binswanger's disease  a degenerative dementia of presenile onset caused by demyelination of the subcortical white matter of the brain.

black disease  a fatal disease of sheep, and sometimes of humans, in the United States and Australia, due to Clostridium novyi, marked by necrotic areas in the liver.

Blocq's disease  astasia-abasia.

Blount disease  tibia vara.

Boeck's disease  sarcoidosis.

Bornholm disease  epidemic pleurodynia.

Bowen's disease  a squamous cell carcinoma in situ, often due to prolonged exposure to arsenic; usually occurring on sun-exposed areas of skin. The corresponding lesion on the glans penis is termed erythroplasia of Queyrat.

Brill's disease  Brill-Zinsser d.

Brill-Symmers disease  giant follicular lymphoma.

Brill-Zinsser disease  mild recrudescence of epidemic typhus years after the initial infection, because Rickettsia prowazekii has persisted in body tissue in an inactive state, with humans as the reservoir.

broad beta disease  familial dysbetalipoproteinemia; named for the electrophoretic mobility of the abnormal chylomicron and very-low-density lipoprotein remnants produced.

Busse-Buschke disease  cryptococcosis.

Caffey's disease  infantile cortical hyperostosis.

calcium hydroxyapatite deposition disease  apatite deposition d.

calcium pyrophosphate deposition disease  (CPDD) an acute or chronic inflammatory arthropathy caused by deposition of calcium pyrophosphate dihydrate (CPPD) crystals in the joints, chondrocalcinosis, and crystals in the synovial fluid. Acute attacks are sometimes called pseudogout.

Calvé-Perthes disease  osteochondrosis of capitular epiphysis of femur.

Camurati-Engelmann disease  diaphyseal dysplasia.

Canavan disease , Canavan-van Bogaert-Bertrand disease spongy degeneration of the central nervous system.

Carrión's disease  bartonellosis.

Castleman disease  a benign or premalignant condition resembling lymphoma but without recognizable malignant cells; there are isolated masses of lymphoid tissue and lymph node hyperplasia, usually in the abdominal or mediastinal area.

cat-scratch disease  a usually benign, self-limited disease of the regional lymph nodes, caused by Bartonella henselae and characterized by a papule or pustule at the site of a cat scratch, subacute painful regional lymphadenitis, and mild fever.

celiac disease  a malabsorption syndrome precipitated by ingestion of gluten-containing foods, with loss of villous structure of the proximal intestinal mucosa, bulky, frothy diarrhea, abdominal distention, flatulence, weight loss, and vitamin and electrolyte depletion.

Chagas disease  trypanosomiasis due to Trypanosoma cruzi; its course may be acute, subacute, or chronic.

Charcot-Marie-Tooth disease  muscular atrophy of variable inheritance, beginning in the muscles supplied by the peroneal nerves and progressing to those of the hands and arms.

cholesteryl ester storage disease  (CESD) a lysosomal storage disease due to deficiency of lysosomal cholesterol esterase, variably characterized by some combination of hepatomegaly, hyperbetalipoproteinemia, and premature atherosclerosis.

Christmas disease  hemophilia B.

chronic granulomatous disease  frequent, severe infections of the skin, oral and intestinal mucosa, reticuloendothelial system, bones, lungs, and genitourinary tract associated with a genetically determined defect in the intracellular bactericidal function of leukocytes.

chronic obstructive pulmonary disease  (COPD) any disorder marked by persistent obstruction of bronchial air flow.

Coats' disease  exudative retinopathy.

collagen disease  any of a group of diseases characterized by widespread pathologic changes in connective tissue; they include lupus erythematosus, dermatomyositis, scleroderma, polyarteritis nodosa, thrombotic purpura, rheumatic fever, and rheumatoid arthritis. Cf. collagen disorder.

communicable disease  a disease the causative agents of which may pass or be carried from one person to another directly or indirectly.

Concato's disease  progressive malignant polyserositis with large effusions into the pericardium, pleura, and peritoneum.

constitutional disease  one involving a system of organs or one with widespread symptoms.

Cori's disease  glycogen storage d., type III.

coronary artery disease  (CAD) atherosclerosis of the coronary arteries, which may cause angina pectoris, myocardial infarction, and sudden death; risk factors include hypercholesterolemia, hypertension, smoking, diabetes mellitus, and low levels of high-density lipoproteins.

coronary heart disease  (CHD) ischemic heart d.

Cowden disease  a hereditary disease marked by multiple ectodermal, mesodermal, and endodermal nevoid and neoplastic anomalies.

Creutzfeldt-Jakob disease  a rare prion disease existing in sporadic, familial, and infectious forms, with onset usually in middle life, and having a wide variety of clinical and pathological features. The most commonly seen are spongiform degeneration of neurons, neuronal loss, gliosis, and amyloid plaque formation, accompanied by rapidly progressive dementia, myoclonus, motor disturbances, and encephalographic changes, with death occurring usually within a year of onset.

Crigler-Najjar disease  see under syndrome.

Crohn's disease  regional enteritis; a chronic granulomatous inflammatory disease usually in the terminal ileum with scarring and thickening of the wall, often leading to intestinal obstruction and formation of fistulas and abscesses.

Crouzon's disease  craniofacial dysostosis.

Cruveilhier's disease  spinal muscular atrophy.

Cushing's disease  Cushing's syndrome in which the hyperadrenocorticism is secondary to excessive pituitary secretion of adrenocorticotropic hormone.

cystic disease of breast  mammary dysplasia with formation of blue dome cysts.

cytomegalic inclusion disease , cytomegalovirus disease an infection due to cytomegalovirus and marked by nuclear inclusion bodies in enlarged infected cells. In the congenital form, there is hepatosplenomegaly with cirrhosis, and microcephaly with mental or motor retardation. Acquired disease may cause a clinical state similar to infectious mononucleosis. When acquired by blood transfusion, postperfusion syndrome results.

deficiency disease  a condition caused by dietary or metabolic deficiency, including all diseases due to an insufficient supply of essential nutrients.

degenerative joint disease  osteoarthritis.

Dejerine's disease , Dejerine-Sottas disease progressive hypertrophic neuropathy.

demyelinating disease  any condition characterized by destruction of the myelin sheaths of nerves.

disappearing bone disease  gradual resorption of a bone or group of bones, sometimes associated with multiple hemangiomas, usually in children or young adults and following trauma.

diverticular disease  a general term including the prediverticular state, diverticulosis, and diverticulitis.

Duchenne's disease 

1. spinal muscular atrophy.

2. progressive bulbar paralysis.

3. tabes dorsalis.

4. Duchenne's muscular dystrophy.

Duchenne-Aran disease  spinal muscular atrophy.

Duhring's disease  dermatitis herpetiformis.

Dukes' disease  a febrile disease of childhood marked by an exanthematous eruption, probably due to a virus of the Coxsackie-ECHO group.

Durand-Nicolas-Favre disease  lymphogranuloma venereum.

Duroziez's disease  congenital mitral stenosis.

Ebola virus disease  fatal acute hemorrhagic fever resembling Marburg virus disease but caused by Ebola virus, seen in the Sudan and Zaire.

Ebstein's disease  see under anomaly.

end-stage renal disease  chronic irreversible renal failure.

Erb's disease  Duchenne's muscular dystrophy.

Erb-Goldflam disease  myasthenia gravis.

Eulenburg's disease  paramyotonia congenita.

extrapyramidal disease  any of a group of clinical disorders marked by abnormal involuntary movements, alterations in muscle tone, and postural disturbances; they include parkinsonism, chorea, athetosis, etc.

Fabry's disease  an X-linked lysosomal storage disease of glycosphingolipid catabolism resulting from deficiency of α-galactosidase A and leading to accumulation of ceramide trihexoside in the cardiovascular and renal systems.

Farber's disease  a lysosomal storage disease due to defective ceramidase and characterized by hoarseness, aphonia, dermatitis, bone and joint deformities, granulomatous reaction, and psychomotor retardation.

Fazio-Londe disease  a rare type of progressive bulbar palsy occurring in childhood.

Feer disease  acrodynia.

fibrocystic disease of breast  a form of mammary dysplasia with formation of cysts of various size containing a semitransparent, turbid fluid that imparts a brown to blue color to the unopened cysts; believed due to abnormal hyperplasia of the ductal epithelium and dilatation of the ducts of the mammary gland, resulting from exaggeration and distortion of normal menstrual cycle–related breast changes.

fibrocystic disease of the pancreas  cystic fibrosis.

fifth disease  erythema infectiosum.

flint disease  chalicosis.

floating beta disease  familial dysbetalipoproteinemia.

focal disease  a localized disease.

foot-and-mouth disease  an acute, contagious viral disease of wild and domestic cloven-footed animals and occasionally humans, marked by vesicular eruption on the lips, buccal cavity, pharynx, legs, and feet.

Forbes' disease  glycogen storage d., type III.

fourth disease  Dukes' d.

fourth venereal disease  granuloma inguinale.

Fox-Fordyce disease  a persistent and recalcitrant, itchy, papular eruption, chiefly of the axillae and pubes, due to inflammation of apocrine sweat glands.

Freiberg's disease  osteochondrosis of the head of the second metatarsal bone.

Friedländer's disease  endarteritis obliterans.

Friedreich's disease  paramyoclonus multiplex.

functional disease  see under disorder.

Garré's disease  sclerosing nonsuppurative osteomyelitis.

gastroesophageal reflux disease  (GERD) any condition resulting from gastroesophageal reflux, characterized by heartburn and regurgitation; see also reflux esophagitis.

Gaucher's disease  a hereditary disorder of glucocerebroside metabolism, marked by the presence of Gaucher's cells in the marrow, and by hepatosplenomegaly and erosion of the cortices of long bones and pelvis. The adult form is associated with moderate anemia and thrombocytopenia, and yellowish pigmentation of the skin; in the infantile form there is, in addition, marked central nervous system impairment; in the juvenile form there are rapidly progressive systemic manifestations but moderate central nervous system involvement.

genetic disease  a general term for any disorder caused by a genetic mechanism, comprising chromosome aberrations (or anomalies), mendelian (or monogenic or single-gene) disorders, and multifactorial disorders.

gestational trophoblastic disease  see under neoplasia.

Gilbert disease  a familial, benign elevation of bilirubin levels without evidence of liver damage or hematologic abnormalities.

Gilles de la Tourette's disease  see under syndrome.

Glanzmann disease  see thrombasthenia.

glycogen storage disease  any of a number of rare inborn errors of metabolism caused by defects in specific enzymes or transporters involved in the metabolism of glycogen.

type I glucose-6-phosphatase deficiency: a severe hepatorenal form due to deficiency of the hepatic enzyme glucose-6-phosphatase, resulting in liver and kidney involvement, with hepatomegaly, hypoglycemia, hyperuricemia, and gout

type IA glycogen storage d., type I.

type IB a form resembling type I but additionally predisposing to infection due to neutropenia and to chronic inflammatory bowel disease; due to a defect in the transport system for glucose 6-phosphate.

type II a disorder due to deficiency of the lysosomal enzyme α-1,4,-glucosidase, the severe infant form resulting in generalized glycogen accumulation, with cardiomegaly, cardiorespiratory failure, and death, and a milder adult form being a gradual skeletal myopathy that sometimes causes respiratory problems.

type III a form due to deficiency of debrancher enzyme (amylo-1,6-glucosidase) in muscle, liver, or both; defects in the liver enzyme are characterized by hepatomegaly and hypoglycemia while defects in the muscle enzyme are characterized by progressive muscle wasting and weakness.

type IV brancher enzyme deficiency; cirrhosis of the liver, hepatosplenomegaly, progressive hepatic failure, and death due to deficiency of the glycogen brancher enzyme (1,4-α-glucan branching enzyme).

type V muscle cramps and fatigue during exercise due to a defect in the skeletal muscle isozyme of glycogen phosphorylase (muscle phosphorylase).

type VI hepatomegaly, mild to moderate hypoglycemia and mild ketosis, due to deficiency of the liver isozyme of glycogen phosphorylase (hepatic phosphorylase).

type VII muscle weakness and cramping after exercise due to deficiency of the muscle isozyme of 6-phosphofructokinase.

type VIII phosphorylase .

graft-versus-host (GVH) disease  disease caused by the immune response of histoincompatible, immunocompetent donor cells against the tissue of immunocompromised host, as a complication of bone marrow transplantation, or as a result of maternal-fetal blood transfusion, or therapeutic transfusion to an immunocompromised recipient.

Graves' disease  an association of hyperthyroidism, goiter, and exophthalmos, with accelerated pulse rate, profuse sweating, nervous symptoms, psychic disturbances, emaciation, and elevated basal metabolism.

Greenfield's disease  former name for the late infantile form of metachromatic leukodystrophy.

Gull's disease  atrophy of the thyroid gland with myxedema.

Günther disease  congenital erythropoietic porphyria.

H disease  Hartnup d.

Hailey-Hailey disease  benign familial pemphigus.

Hallervorden-Spatz disease  an autosomal recessive disorder caused by decreased numbers of myelin sheaths of the globus pallidus and substantia nigra, with accumulation of iron pigment, progressive rigidity beginning in the legs, choreoathetoid movements, dysarthria, and mental deterioration.

Hand's disease  Hand-Schüller-Christian d.

hand-foot-and-mouth disease  a mild, highly infectious viral disease of children, with vesicular lesions in the mouth and on the hands and feet.

Hand-Schüller-Christian disease  a chronic, progressive form of multifocal Langerhans cell histiocytosis, sometimes with accumulation of cholesterol, characterized by the triad of calvarial bone defects, exophthalmos, and diabetes insipidus.

Hansen's disease  leprosy.

Hartnup disease  a hereditary disorder of intestinal and renal transport of neutral α-amino acids, marked by a pellagra-like skin rash, with transient cerebellar ataxia, constant renal aminoaciduria, and other biochemical abnormalities.

Hashimoto's disease  a progressive disease of the thyroid gland with degeneration of its epithelial elements and replacement by lymphoid and fibrous tissue.

heavy chain diseases  a group of malignant neoplasms of lymphoplasmacytic cells marked by the presence of immunoglobulin heavy chains or heavy chain fragments; they are classified according to heavy chain type, e.g., alpha chain disease.

Heine-Medin disease  the major form of poliomyelitis.

hemoglobin disease  any of various hereditary molecular diseases characterized by abnormal hemoglobins in the red blood cells; the homozygous form is manifested by hemolytic anemia.

hemolytic disease of the newborn  erythroblastosis fetalis.

hemorrhagic disease of the newborn  a self-limited hemorrhagic disorder of the first few days of life, due to deficiency of vitamin K–dependent coagulation factors II, VII, IX, and X.

Hers' disease  glycogen storage d., type VI.

Heubner-Herter disease  the infantile form of celiac disease.

hip-joint disease  tuberculosis of the hip joint.

Hippel's disease  von Hippel's d.

Hirschsprung's disease  congenital megacolon.

His disease , His-Werner disease trench fever.

Hodgkin's disease  a form of malignant lymphoma marked clinically by painless, progressive enlargement of lymph nodes, spleen, and general lymphoid tissue; other symptoms may include anorexia, lassitude, weight loss, fever, pruritus, night sweats, and anemia. Reed-Sternberg cells are characteristically present. Four types have been distinguished on the basis of histopathologic criteria.

hoof-and-mouth disease  foot-and-mouth d.

hookworm disease  infection with the hookworm Ancylostoma duodenale or Necator americanus, whose larvae enter the body through the skin or in contaminated food or water and migrate to the small intestine where, as adults, they attach to the mucosa and ingest blood; symptoms may include abdominal pain, diarrhea, colic or nausea, and anemia.

hyaline membrane disease  a type of respiratory distress syndrome of the newborn in which there is formation of a hyaline-like membrane lining the terminal respiratory passages; extensive atelectasis is attributed to lack of surfactant.

hydatid disease  an infection, usually of the liver, due to larval forms of tapeworms of the genus Echinococcus, marked by development of expanding cysts.

hypophosphatemic bone disease  an inherited disorder resembling a mild form of X-linked hypophosphatemia, similarly due to a defect in renal tubular function but usually showing osteomalacia without radiographic evidence of rickets.

immune complex disease  local or systemic disease caused by the formation of circulating immune complexes and their deposition in tissue, due to activation of complement and to recruitment and activation of leukocytes in type III hypersensitivity reactions.

infectious disease  one due to organisms ranging in size from viruses to parasitic worms; it may be contagious in origin, result from nosocomial organisms, or be due to endogenous microflora from the nose and throat, skin, or bowel.

inflammatory bowel disease  any idiopathic inflammatory disease of the bowel, such as Crohn's disease and ulcerative colitis.

intercurrent disease  one occurring during the course of another disease with which it has no connection.

iron storage disease  hemochromatosis.

ischemic bowel disease  ischemic colitis.

ischemic heart disease  (IHD) any of a group of acute or chronic cardiac disabilities resulting from insufficient supply of oxygenated blood to the heart.

Janský-Bielschowsky disease  the late infantile form of neuronal ceroid lipofuscinosis, occurring between two and four years of age, characterized by abnormal accumulation of lipofuscin; beginning as myoclonic seizures and progressing to neurologic and retinal deterioration and death by age 8 to 12.

jumping disease  any of several culture-specific disorders characterized by exaggerated responses to small stimuli, muscle tics including jumping, obedience even to dangerous suggestions, and sometimes coprolalia or echolalia.

juvenile Paget disease  hyperostosis corticalis deformans juvenilis.

Kashin-Bek (Kaschin-Beck) disease  a disabling degenerative disease of the peripheral joints and spine, endemic in northeastern Asia; believed to be caused by ingestion of cereal grains infected with the fungus Fusarium sporotrichiella.

Katayama disease  schistosomiasis japonica.

Kawasaki disease  a febrile illness usually affecting infants and young children, with conjunctival injection, changes to the oropharyngeal mucosa, changes to the peripheral extremities including edema, erythema, and desquamation, a primarily truncal polymorphous exanthem, and cervical lymphadenopathy. It is often associated with vasculitis of the large coronary vessels.

Kienböck's disease  slowly progressive osteochondrosis of the lunate bone; it may affect other wrist bones.

kinky hair disease  Menkes' syndrome.

Köhler's bone disease 

1. osteochondrosis of the tarsal navicular bone in children.

2. thickening of the shaft of the second metatarsal bone and changes about its articular head, with pain in the second metatarsophalangeal joint on walking or standing.

Krabbe's disease  a lysosomal storage disease beginning in infancy, due to deficiency of β-galactosidase. Pathologically, there is rapidly progressive cerebral demyelination and large globoid bodies (swollen with accumulated cerebroside) in the white substance.

Kufs' disease  the adult form of neuronal ceroid lipofuscinosis, with onset prior to age 40; characterized by progressive neurologic deterioration but not blindness, excessive storage of lipofuscin, and shortened life expectancy;

Kümmell's disease  compression fracture of vertebra, with symptoms a few weeks after injury, including spinal pain, intercostal neuralgia, lower limb motor disturbances, and kyphosis.

Kyasanur Forest disease  a fatal viral disease of monkeys in the Kyasanur Forest of India, communicable to humans, in whom it produces hemorrhagic symptoms.

Kyrle's disease  a chronic disorder of keratinization marked by keratotic plugs that develop in hair follicles and eccrine ducts, penetrating the epidermis and extending down into the corium, causing foreign-body reaction and pain.

Lafora's disease  see under epilepsy.

Leber's disease 

1. Leber's hereditary optic neuropathy.

2. Leber's congenital amaurosis.

legionnaires' disease  an often fatal bacterial infection caused by Legionella pneumophila, not spread by person-to-person contact, characterized by high fever, gastrointestinal pain, headache, and pneumonia; there may also be involvement of the kidneys, liver, and nervous system.

Leiner's disease  a disorder of infancy characterized by generalized seborrhea-like dermatitis and erythroderma, severe intractable diarrhea, recurrent infections, and failure to thrive.

Leriche disease  post-traumatic osteoporosis.

Letterer-Siwe disease  a Langerhans cell histiocytosis of early childhood, of autosomal recessive inheritance, characterized by cutaneous lesions resembling seborrheic dermatitis, hemorrhagic tendency, hepatosplenomegaly, lymphadenitis, and progressive anemia. If untreated it is rapidly fatal. Called also acute disseminated Langerhans cell histiocytosis.

Libman-Sacks disease  see under endocarditis.

Lindau's disease , Lindau-von Hippel disease von Hippel-Lindau d.

Little's disease  congenital spastic stiffness of the limbs, a form of cerebral palsy due to lack of development of the pyramidal tracts.

Lobstein's disease  see osteogenesis imperfecta.

Lou Gehrig disease  amyotrophic lateral sclerosis.

Lowe disease  oculocerebrorenal syndrome.

Lutz-Splendore-Almeida disease  paracoccidioidomycosis.

Lyme disease  a recurrent multisystemic disorder caused by the spirochete Borrelia burgdorferi, the vectors being the ticks Ixodes scapularis and I. pacificus; usually initially characterized by lesions of erythema chronicum migrans, followed by various manifestations including arthritis of the large joints, myalgia, and neurologic and cardiac abnormalities.

lysosomal storage disease  an inborn error of metabolism with (1) a defect in a specific lysosomal enzyme; (2) intracellular accumulation of an unmetabolized substrate; (3) clinical progression affecting multiple tissues or organs; (4) considerable phenotypic variation within a disease.

MAC disease  complex d.

McArdle disease  glycogen storage d., type V.

mad cow disease  bovine spongiform encephalopathy.

Madelung's disease 

1. see under deformity.

2. see under neck.

maple bark disease  hypersensitivity pneumonitis in logging and sawmill workers due to inhalation of spores of a mold, Cryptostroma corticale, growing under the maple bark.

maple syrup urine disease  (MSUD) a hereditary enzyme defect in metabolism of branched chain amino acids, marked clinically by mental and physical retardation, severe ketoacidosis, feeding difficulties, and a characteristic maple syrup odor in the urine and on the body.

Marburg virus disease  a severe, often fatal, viral hemorrhagic fever first reported in Marburg, Germany, among laboratory workers exposed to African green monkeys.

Marchiafava-Micheli disease  paroxysmal nocturnal hemoglobinuria.

Marie-Bamberger disease  hypertrophic pulmonary osteoarthropathy.

Marie-Strümpell disease  ankylosing spondylitis.

Marie-Tooth disease  Charcot-Marie-Tooth d.

Mediterranean disease  thalassemia major.

medullary cystic disease  familial juvenile nephronophthisis.

Meniere's disease  deafness, tinnitus, and dizziness, in association with nonsuppurative disease of the labyrinth.

mental disease  see under disorder.

Merzbacher-Pelizaeus disease  Pelizaeus-Merzbacher d.

metabolic disease  one caused by a disruption of a normal metabolic pathway because of a genetically determined enzyme defect.

Meyer's disease  adenoid vegetations of the pharynx.

Mikulicz's disease  benign, self-limited lymphocytic infiltration and enlargement of the lacrimal and salivary glands of uncertain etiology.

Milroy disease  hereditary permanent lymphedema of the legs due to lymphatic obstruction.

Minamata disease  a severe neurologic disorder due to alkyl mercury poisoning, with permanent neurologic and mental disabilities or death; once prevalent among those eating contaminated seafood from Minamata Bay, Japan.

minimal change disease  subtle alterations in kidney function demonstrable by clinical albuminuria and the presence of lipid droplets in cells of the proximal tubules, seen primarily in young children.

mixed connective tissue disease  a combination of scleroderma, myositis, systemic lupus erythematosus, and rheumatoid arthritis, and marked serologically by the presence of antibody against extractable nuclear antigen.

Möbius disease  ophthalmoplegic migraine.

molecular disease  any disease in which the pathogenesis can be traced to a single molecule, usually a protein, which is either abnormal in structure or present in reduced amounts.

Mondor's disease  phlebitis affecting the large subcutaneous veins normally crossing the lateral chest wall and breast from the epigastric or hypochondriac region to the axilla.

Monge's disease  chronic mountain sickness.

Morquio's disease , Morquio-Ullrich disease see under syndrome.

motor neuron disease , motor system disease any disease of a motor neuron, including spinal muscular atrophy, progressive bulbar paralysis, amyotrophic lateral sclerosis, and lateral sclerosis.

Mycobacterium avium complex disease  MAC disease; systemic disease caused by infection with organisms of the Mycobacterium avium-intracellulare complex in patients with human immunodeficiency virus infection.

Newcastle disease  a viral disease of birds, including domestic fowl, transmissible to humans, characterized by respiratory, gastrointestinal or pulmonary, and encephalitic symptoms.

new variant Creutzfeldt-Jakob disease  (nvCJD) a variant of Creutzfeldt-Jakob disease having a younger age of onset than is seen in Creutzfeldt-Jakob disease, and caused by the same agent that causes bovine spongiform encephalopathy.

Nicolas-Favre disease  lymphogranuloma venereum.

Niemann's disease , Niemann-Pick disease a lysosomal storage disease due to sphingomyelin accumulation in the reticuloendothelial system; there are five types distinguished by age of onset, amount of central nervous system involvement, and degree of enzyme deficiency.

nil disease  minimal change d.

Norrie's disease  an X-linked disorder consisting of bilateral blindness from retinal malformation, mental retardation, and deafness.

notifiable disease  one required to be reported to federal, state, or local health officials when diagnosed, because of infectiousness, severity, or frequency of occurrence.

oasthouse urine disease  methionine malabsorption syndrome.

obstructive small airways disease  chronic bronchitis with irreversible narrowing of the bronchioles and small bronchi with hypoxia and often hypercapnia.

occupational disease  disease due to various factors involved in one's employment.

Oguchi's disease  a form of hereditary night blindness and fundus discoloration following light adaptation.

organic disease  one associated with demonstrable change in a bodily organ or tissue.

Osgood-Schlatter disease  osteochondrosis of the tuberosity of the tibia.

Osler's disease 

1. polycythemia vera.

2. hereditary hemorrhagic telangiectasia.

Owren's disease  parahemophilia.

Paget's disease 

1. (of bone) osteitis deformans.

2. (of breast) an intraductal inflammatory carcinoma of the breast, involving the areola and nipple.

3. an extramammary counterpart of Paget's disease (2), usually involving the vulva, and sometimes other sites, as the perianal and axillary regions.

Parkinson's disease  a slowly progressive form of parkinsonism, usually seen late in life, marked by masklike facies, tremor of resting muscles, slowing of voluntary movements, festinating gait, peculiar posture, muscular weakness, and sometimes excessive sweating and feelings of heat.

Parrot's disease  see under pseudoparalysis.

parrot disease  psittacosis.

Parry's disease  Graves' d.

Pelizaeus-Merzbacher disease  a progressive familial form of leukoencephalopathy, marked by nystagmus, ataxia, tremor, parkinsonian facies, dysarthria, and mental deterioration.

Pellegrini's disease , Pellegrini-Stieda disease calcification of the medial collateral ligament of the knee due to trauma.

pelvic inflammatory disease  (PID) any pelvic infection involving the upper female genital tract beyond the cervix.

periodontal disease  any disease or disorder of the periodontium.

Perthes' disease  osteochondrosis of capitular femoral epiphysis.

Peyronie's disease  induration of the corpora cavernosa of the penis, producing a painful fibrous chordee and penile curvature.

Pfeiffer's disease  infectious mononucleosis.

Pick's disease 

1. progressive atrophy of the cerebral convolutions in a limited area (lobe) of the brain, with clinical manifestations and course similar to Alzheimer's disease.

2. Niemann-Pick d.

polycystic kidney disease , polycystic disease of kidneys either of two unrelated heritable disorders marked by cysts in both kidneys: the autosomal dominant or adult form is more common, appears in adult life, and is marked by loss of renal function that can be either rapid or slow; the autosomal recessive or infantile form is more rare, may be congenital or may appear later in childhood, and almost always progresses to renal failure.

polycystic renal disease  polycystic kidney d..

Pompe's disease  glycogen storage d., type II.

Pott's disease  spinal tuberculosis.

primary electrical disease  serious ventricular tachycardia, and sometimes ventricular fibrillation, in the absence of recognizable structural heart disease.

prion disease  any of a group of fatal, transmissible neurodegenerative diseases, which may be sporadic, familial, or acquired, caused by abnormalities of prion protein metabolism resulting from mutations in the prion protein gene or from infection with pathogenic forms of the protein.

pulseless disease  Takayasu's arteritis.

Raynaud's disease  a primary or idiopathic vascular disorder, most often affecting women, marked by bilateral attacks of Raynaud's phenomenon.

Recklinghausen's disease 

1. neurofibromatosis.

2. (of bone) osteitis fibrosa cystica generalisata.

Refsum's disease  an inherited disorder of lipid metabolism, characterized by accumulation of phytanic acid, chronic polyneuritis, retinitis pigmentosa, cerebellar ataxia, and persistent elevation of protein in cerebrospinal fluid.

remnant removal disease  familial dysbetalipoproteinemia.

reversible obstructive airway disease  a condition characterized by bronchospasm reversible by intervention, as in asthma.

rheumatic heart disease  the most important manifestation and sequel to rheumatic fever, consisting chiefly of valvular deformities.

rheumatoid disease  a systemic condition best known by its articular involvement (rheumatoid arthritis) but emphasizing nonarticular changes, e.g., pulmonary interstitial fibrosis, pleural effusion, and lung nodules.

Ritter's disease  dermatitis exfoliativa neonatorum.

Roger's disease  a ventricular septal defect; the term is usually restricted to small, asymptomatic defects.

runt disease  a graft-versus-host disease produced by immunologically competent cells in a foreign host that is unable to reject them, resulting in gross retardation of host development and in death.

Salla disease  an inherited disorder of sialic acid metabolism characterized by accumulation of sialic acid in lysosomes and excretion in the urine, mental retardation, delayed motor development, and ataxia.

Sandhoff's disease  a type of GM2 gangliosidosis resembling Tay-Sachs disease, seen in non-Jews, marked by a progressively more rapid course, and due to a defect in hexosaminidase, both isozymes A and B.

Schamberg's disease  a slowly progressive purpuric and pigmentary disease of the skin affecting chiefly the shins, ankles, and dorsa of the feet.

Schilder's disease  subacute or chronic leukoencephalopathy in children and adolescents, similar to adrenoleukodystrophy; massive destruction of the white substance of the cerebral hemispheres leads to blindness, deafness, bilateral spasticity, and mental deterioration.

Schönlein's disease  see under purpura.

secondary disease 

1. one subsequent to or as a consequence of another disease.

2. one due to introduction of incompatible, immunologically competent cells into a host rendered incapable of rejecting them by heavy exposure to ionizing radiation.

self-limited disease  one that runs a limited and definite course.

serum disease  see under sickness.

severe combined immunodeficiency disease  (SCID) see under immunodeficiency .

sexually transmitted disease  venereal disease; any of a diverse group of infections transmitted by sexual contact; in some this is the only important mode of transmission, and in others transmission by nonsexual means is possible.

sickle cell disease  any disease associated with the presence of hemoglobin S.

Simmonds' disease  see panhypopituitarism.

sixth disease  exanthema subitum.

small airways disease  chronic obstructive bronchitis with irreversible narrowing of the bronchioles and small bronchi. See also obstructive small airways d.

Smith-Strang disease  methionine malabsorption syndrome.

Spielmeyer-Vogt disease  Vogt-Spielmeyer d.

Steinert's disease  myotonic dystrophy.

Still's disease  juvenile rheumatoid arthritis.

storage disease  a metabolic disorder in which a specific substance (a lipid, a protein, etc.) accumulates in certain cells in unusually large amounts.

storage pool disease  a blood coagulation disorder due to failure of the platelets to release adenosine diphosphate (ADP) in response to aggregating agents; characterized by mild bleeding episodes, prolonged bleeding time, and reduced aggregation response to collagen or thrombin.

Strümpell's disease 

1. hereditary lateral sclerosis with the spasticity mainly limited to the legs.

2. cerebral poliomyelitis.

Strümpell-Leichtenstern disease  hemorrhagic encephalitis.

Strümpell-Marie disease  ankylosing spondylitis.

Sutton's disease 

1. halo nevus.

2. periadenitis mucosa necrotica recurrens.

3. granuloma fissuratum.

Swift's disease , Swift-Feer disease acrodynia.

Takayasu's disease  see under arteritis .

Tangier disease  a familial disorder characterized by a deficiency of high-density lipoproteins in the blood serum, with storage of cholesteryl esters in tissues.

Tarui's disease  glycogen storage d., type VII.

Tay-Sachs disease  (TSD) the most common GM2 gangliosidosis, seen almost exclusively in northeastern European Jews, characterized by infantile onset, doll-like facies, cherry-red macular spot, early blindness, hyperacusis, macrocephaly, seizures, hypotonia, and death in early childhood.

Thomsen's disease  myotonia congenita.

thyrotoxic heart disease  heart disease associated with hyperthyroidism, marked by atrial fibrillation, cardiac enlargement, and congestive heart failure.

transmissible neurodegenerative disease  prion d..

trophoblastic disease  gestational trophoblastic neoplasia.

tsutsugamushi disease  scrub typhus.

tunnel disease  decompression sickness.

uremic bone disease  renal osteodystrophy.

venereal disease  sexually transmitted d.

venoocclusive disease of the liver  symptomatic occlusion of the small hepatic venules caused by ingestion of Senecio tea or related substances, by certain chemotherapy agents, or by radiation.

vinyl chloride disease  acro-osteolysis resulting from exposure to vinyl chloride, characterized by Raynaud's phenomenon and skin and bony changes on the limbs.

Vogt-Spielmeyer disease  the juvenile form of neuronal ceroid lipofuscinosis with onset between ages 5 and 10 years; characterized by rapid cerebroretinal degeneration, excessive neuronal storage of lipofuscin, and death within 10 to15 years.

Volkmann's disease  congenital deformity of the foot due to tibiotarsal dislocation.

von Hippel's disease  hemangiomatosis confined principally to the retina; when associated with hemangioblastoma of the cerebellum, it is known as von Hippel-Lindau d.

von Hippel-Lindau disease  a hereditary condition marked by hemangiomas of the retina and hemangioblastomas of the cerebellum, sometimes with similar lesions of the spinal cord and cysts of the viscera; there may be neurologic symptoms such as seizures and mental retardation.

von Willebrand's disease  an autosomal dominant bleeding disorder characterized by prolonged bleeding time, deficiency of von Willebrand's factor, and often impairment of adhesion of platelets on glass beads, associated with epistaxis and increased bleeding after trauma or surgery, menorrhagia, and postpartum bleeding.

Waldenström's disease  osteochondrosis of the capitular femoral epiphysis.

Weber-Christian disease  nodular nonsuppurative panniculitis.

Werlhof's disease  idiopathic thrombocytopenic purpura.

Wernicke's disease  see under encephalopathy.

Westphal-Strümpell disease  hepatolenticular degeneration.

Whipple's disease  a malabsorption syndrome marked by diarrhea, steatorrhea, skin pigmentation, arthralgia and arthritis, lymphadenopathy, central nervous system lesions, and infiltration of the intestinal mucosa with macrophages containing PAS-positive material.

Whitmore's disease  melioidosis.

Wilson's disease  an inherited, progressive disorder of copper metabolism, with accumulation of copper in liver, brain, kidney, cornea, and other tissues; it is characterized by cirrhosis in the liver, degenerative changes in the brain, and a pigmented ring at the outer margin of the cornea.

Wolman's disease  a lysosomal storage disease due to deficiency of the lysosomal sterol esterase, occurring in infants, and associated with hepatosplenomegaly, adrenal steatorrhea, calcification, abdominal distention, anemia, and inanition.

woolsorter's disease  inhalational anthrax.

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coronary artery disease

n. Abbr. CAD

Atherosclerosis of the coronary arteries associated with genetic predisposition or other risk factors, including hyperlipidemia, hypertension, smoking, and diabetes mellitus.

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coronary artery disease (CAD),

an abnormal condition that may affect the heart's arteries and produce various pathologic effects, especially the reduced flow of oxygen and nutrients to the myocardium. The most common kind of coronary artery disease is coronary atherosclerosis, now the leading cause of death in the Western world. Other coronary artery diseases include coronary arteritis and fibromuscular hyperplasia of the coronary arteries. Also called coronary heart disease.

observations Angina pectoris, the classic symptom of coronary artery disease, results from myocardial ischemia. Diagnosis of coronary artery disease is usually based on patient history and tests such as exercise stress tests, electrocardiography, coronary angiography, and myocardial perfusion imaging.

interventions Treatment concentrates on reducing myocardial oxygen demand or on increasing oxygen supply. Therapy commonly includes the administration of nitrates, such as nitroglycerin or isosorbide dinitrate; a beta-adrenergic blocker; or calcium channel blockers. Surgical interventions include coronary artery bypass surgery, angioplasty, insertion of cardiac stents, and atherectomy. The prevalence of coronary artery disease highlights the importance of preventive measures, such as reduced caloric intake by the obese patient; lowered salt, fats, and cholesterol consumption; regular exercise; abstention from the use of tobacco products; and reduction of stress.

nursing considerations The nurse monitors blood pressure and heart rate, records electrocardiograms during anginal episodes, and administers drugs, such as nitroglycerin. The nurse is especially alert to signs of ischemia and arrhythmias and, before the patient is discharged, stresses the importance of following the prescribed regimens of diet, medication, exercise, and cessation of tobacco use.

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coronary artery disease

Coronary heart disease Cardiology Atherosclerosis of the coronary arteries which ↑ a person's risk of cardiovascular M&M. See Atherosclerosis, Myocardial infarction.

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Patient discussion about coronary artery disease.

Q. my mother have stem replacement for a coronary artery oclusion is already 2 years she physically deteriorating since surgery why???? please help she does not have energy

A. I agree with Dagmar. It can be most likely caused by another occlusion or re-occlusion inside the heart blood vessels. Since that is a life-threatening case, I strongly suggest you to bring your mother into a hospital (for complete check up), or just call your cardiologist to have first treatment.

Meanwhile, that will be better if you have emergency oxygen (just in case you'll need it) with you.