heart (hahrt) cor; the viscus of cardiac muscle that maintains the circulation of the blood.
heart
heart,
heart
HEART
Patient discussion about heart sinks.
artificial heart a pumping mechanism that duplicates the rate, output, and blood pressure of the natural heart; it may replace the function of a part or all of the heart.
athletic heart hypertrophy of the heart without valvular disease, sometimes seen in athletes.
extracorporeal heart an artificial heart located outside the body and usually performing pumping and oxygenating functions.
fatty heart
1. one that has undergone fatty degeneration.
2. a condition in which fat has accumulated around and in the heart muscle.
fibroid heart one in which fibrous tissue replaces portions of the myocardium, such as may occur in chronic myocarditis.
horizontal heart a counterclockwise rotation of the electrical axis (deviation to the left) of the heart.
left heart the left atrium and ventricle, which propel the blood through the systemic circulation.
right heart the right atrium and ventricle, which propel the venous blood into the pulmonary circulation.
stone heart massive contraction band necrosis in an irreversibly noncompliant hypertrophied heart, occurring as a complication of cardiac surgery; believed due to low levels of ATP and to calcium overload.
three-chambered heart a developmental anomaly in which the heart is missing the interventricular or interatrial septum and so has only three compartments. 
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Three-chambered heart in which the interventricular septum is absent (common ventricle).
water-bottle heart a radiographic sign of pericardial effusion, in which the cardiopericardial silhouette is enlarged and assumes the shape of a flask or water bottle.
| heart (härt) n. 1. The chambered, muscular organ in vertebrates that pumps blood received from the veins into the arteries, thereby maintaining the flow of blood through the entire circulatory system. 2. A similarly functioning structure in invertebrates. |   anterior view |
heart
Etymology: AS, heorte
the muscular cone-shaped hollow organ, about the size of a clenched fist, that pumps blood throughout the body and beats normally about 70 times per minute by coordinated nerve impulses and muscular contractions. Enclosed in pericardium, it rests on the diaphragm between the lower borders of the lungs, occupying the middle of the mediastinum. It is covered ventrally by the sternum and the adjoining parts of the third to the sixth costal cartilages. The organ is about 12 cm long, 8 cm wide at its broadest part, and 6 cm thick. The weight of the heart in men averages between 280 and 340 g and in women, between 230 and 280 g. The layers of the heart, starting from the outside, are the epicardium, the myocardium, and the endocardium. The chambers include two ventricles with thick muscular walls, making up the bulk of the organ, and two atria with thin muscular walls. A septum separates the ventricles and extends between the atria (interatrial septum), dividing the heart into the right and the left sides. The left side of the heart pumps oxygenated blood into the aorta and on to all parts of the body. The right side receives deoxygenated blood from the vena cava and pumps it into the pulmonary arteries. The valves of the heart include the tricuspid valve, the bicuspid (mitral) valve, the semilunar aortic valve, and the semilunar pulmonary valve. The sinoatrial node in the right atrium of the heart (under the control of the medulla oblongata in the brainstem) initiates the cardiac impulse, causing the atria to contract. The atrioventricular (AV) node near the septal wall of the right atrium spreads the impulse over the AV bundle (bundle of His) and its branches, causing the ventricles to contract. Both atria contract simultaneously, followed quickly by the simultaneous contraction of the ventricles. The sinoatrial node of the heartbeat sets the rate. Other factors affecting the heartbeat are emotion, exercise, hormones, temperature, pain, and stress. See also endocardium, epicardium, heart valve, myocardium.
heart,
n the muscular pump that maintains and regulates the flow of blood through the body.
heart, artificial,
n a mechanical device that acts to pump blood to and from the body tissues during repair of the heart.
heart attack,
heart block,
n the condition in which the muscular interconnection between the auricle and ventricle is interrupted so that the auricle and ventricle beat independently of each other.
heart, compression of,
n See massage, cardiac.
heart defect,
n a fault in the structural integrity of the heart.
heart defect, congenital,
n the structural errors in the heart formed during embryonic and fetal life.
heart disease,
n a disorder in the normal functioning of the heart.
heart disease, dental concerns,
n.pl the special considerations taken to eliminate oral disease by maintaining an elevated level of oral health and prevent infective endocarditis, an infection of the heart valves that may be caused by bacteremia created during dental treatments. Heart disease has also been linked with increased levels of periodontal disease.
heart disease, ischemic,
heart disease risk factors,
n.pl the hereditary, lifestyle, and environmental influences that increase one's chances of developing heart disease.
heart massage,
n See massage, cardiac.
heart murmur,
n the sound of blood flowing back through a defective heart valve. Two types are possible: organic or functional.
heart, normal,
n a heart without anatomic defects that could cause an impairment in the function of the organ.
heart rate,
n the rate or tempo of heart contractions recorded in beats per minute.
heart sounds,
n.pl the normal noises produced within the heart during the cardiac cycle that can be heard over the precordium and may reveal abnormalities in cardiac structure or function. The use of the stethoscope over the left side of the chest is a common clinical technique to assess heart function. The typical sounds are a rythmic lub dup; abnormal sounds include clicks, murmurs, rubs, snaps, and gallops.
heart surgery,
n a surgical procedure involving the heart, performed to correct acquired or congenital defects, to replace diseased valves, to open or bypass blocked vessels, or to graft a prosthesis or a transplant in place.
heart valves,
n.pl one of the four structures within the heart that prevent backflow of blood by opening and closing with each heartbeat. They include two semilunar valves, the aortic and pulmonary; the mitral, or bicuspid, valve; and the tricuspid valve. They permit the flow of blood in only one direction, and any one of the valves may become defective, permitting the backflow associated with heart murmurs.
heart
the hollow muscular organ lying on the sternum that serves as a pump controlling the blood flow in two circuits, the pulmonary and the systemic. See also circulatory system.
artificial heart
a mechanical device that replaces the heart by using pulsating air to pump blood to the body. Successfully placed in calves, sheep and dogs as experimental models for the subsequent use of such methods in humans.
heart attack
see myocardial infarction.
heart bones
ossicles in the fibrous skeletal ring which surrounds the aortic orifice of the heart in cattle and occasionally in other species; called also ossa cordis.
heart conducting system
consists of the sinoatrial node, the atrioventricular node, the atrioventricular bundle and its two crura.
cyanotic heart malformations
insufficient oxygenated hemoglobin is received in the peripheral capillary beds resulting in blue discoloration of tissues, and an incapacity of the body to maintain a life-sustaining level of activity.
heart disease
an all-embracing term including those diseases in which there is intrinsic disease of the heart such as uremia, valvular disease, African horse sickness, vitamin E-selenium nutritional deficiency, inherited cardiomyopathies of dogs and cattle, altitude sickness, canine parvovirus infection, and in a number of plant and other poisonings. See also mulberry heart disease.
heart failure cells
hemosiderin-laden macrophages present in the pulmonary alveoli in cases of congestive heart failure.
heart malformations
includes ectopia cordis, patent foramen ovale, ventricular septal defects such as Fallot's tetralogy, Eisenmenger complex, patent ductus arteriosus, aortic coarctation, right aortic arch persistence, truncus arteriosus persistence, fibroelastosis, subvalvular aortic stenosis, anomalous origin of carotid arteries, transposition of great vessels, pulmonic stenosis, aortic stenosis.
heart massage
see cardiac massage.
heart meridian points
acupuncture points along the heart meridian.
heart rate
the number of contractions of the cardiac ventricles per unit of time. For normal rates see pulse rate.
heart score
a concept which sets out that performance in racing horses is related to heart size, now a well-established relationship, and that heart size can be estimated in the living horse by the measurement of the QRS interval.
heart sounds
see heart sounds, heart murmur.
heart strain
is an unpopular concept in any medical science but overtrained horses which perform poorly do have a high incidence of abnormal T waves.
heart valve anomalies
failure of complete development of atrioventricular or semilunar valves results in stenosis or incompetence of the valves and often congestive heart failure.
heart valve hematoma
congenital, usually multiple lesions on the edges of atrioventricular valves, mostly in calves; disappear spontaneously in most cases.
heart valve thrombosis
common lesion on the free edges of valves, often the source of widespread emboli; on healing leave scarred, insufficient valves.
heart valves
flaps of endothelial connective tissue that guard the entrance into and exit from the ventricles and bring about unidirectional blood flow. Include the atrioventricular and semilunar valves, the proper closure of which is essential to maintain circulatory equilibrium, can be diseased and cause heart failure. See also heart murmur, endocarditis, endocardiosis.
heart
See Abiomed implantable heart, Athlete's heart, Baby Fae heart, Bleeding heart, Crisscross heart, Dextroposition heart, Depraved heart, Egg-shaped heart, Flabby heart, Flask-shaped heart, Holiday heart, Left heart, Mongolian
heart, Old soldier's heart, Penn State heart, Right heart, Sabot heart, Second heart, Stone heart, Swinging heart, Water bottle heart.
HEART
Cardiology A clinical trial–Healing & Early Afterload Reducing Therapy
Patient discussion about heart sinks.
Q. How to get rid of a heart burn? Help! I have constant heart burn, how to make it go away?
A. try a glass of water with a teaspoon of baking soda.instant relief.
Q. What Is the Treatment for Congestive Heart Failure? My mother is 76 years ols and has been suffering from a heart disease for many years. Lately she has developed congestive heart failure. How is this situation treated?
A. The treatment of CHF focuses on treating the symptoms and signs of CHF and preventing the progression of disease. If there is a reversible cause of the heart failure (an infection, alcohol consumption, anemia, arrhythmia, or hypertension), that should be addressed as well. Treatments include exercise, eating healthy foods, reduction in salty foods, and abstinence from smoking and drinking alcohol.
Q. Heart serious, Lungs swollen. My brother Bennet, seventeen, and it is birthday tomorrow. But I guess he already got his seventeenth birthday present: lupus. He is recently diagnosed with lupus, yet some complications are still under-diagnosed. He have always had huge aspirations. Now, as my health deterioates at a weird rate, he can't walk around. His heart is in serious condition, his lungs are swollen, so are his joints. His voice is almost not there and he is, thinking about his eighteenth birthday. His face is swollen, as some gland in his neck has bloated and somehow he don't enjoy what he see in the mirror he says. He is very sensitive to sunlight and so he stay in for all day and when he decide to go out, it is after 8 or 9 p.m. He is despondent, yes. Because he see his dreams shattering, his family life is breaking apart and he feels as if he is getting more useless EVERY single day. How long will he continue? Maybe another thirty years...maybe not another day. Could anyone help him to SURV
A. Sorry to hear about your brother being so miserable with his symptoms, and the apparent distress it understandably is causing you.
With sunlight bothering him, that is called photophobia and is a symptom of certain types of lupus, or can be an effect from a medication he may be taking. The swelling on his neck may be due to hyperthyroidism, asthma, or an allergic reaction perhaps to prednisone, which is given to lupus patients.
You should get your bother to see a doctor soon, if you have not already. You don't want him to stop breathing or anything.
Dan
Read more or ask a question about heart sinksWith sunlight bothering him, that is called photophobia and is a symptom of certain types of lupus, or can be an effect from a medication he may be taking. The swelling on his neck may be due to hyperthyroidism, asthma, or an allergic reaction perhaps to prednisone, which is given to lupus patients.
You should get your bother to see a doctor soon, if you have not already. You don't want him to stop breathing or anything.
Dan
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