mitral valve


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Related to mitral valve: mitral valve prolapse, mitral valve stenosis, pulmonary valve, aortic valve, tricuspid valve, Mitral valve regurgitation

valve

 [valv]
a membranous fold in a canal or passage that prevents backward flow of material passing through it.
aortic valve a semilunar valve that separates the left ventricle and the aorta; it opens with end diastole, causing the second heart sound.
atrioventricular v's the cardiac valves between the right atrium and right ventricle (tricuspid valve) and the left atrium and left ventricle (mitral valve).
bicuspid valve mitral valve.
bicuspid aortic valve a congenital anomaly of the aortic valve, caused by incomplete separation of two of the three cusps; it is generally asymptomatic early in life but is predisposed to calcification and stenosis later on.
Braschi valve a one-way valve put into the inspiratory limb of a ventilator circuit in order to measure the intrinsic positive end-expiratory pressure.
cardiac v's valves that control flow of blood through and from the heart.
coronary valve a valve at the entrance of the coronary sinus into the right atrium.
flail mitral valve a mitral valve having a cusp that has lost its normal support (as in ruptured chordae tendineae) and flutters in the blood stream.
heart v's cardiac valves.
Heimlich valve a small one-way valve used for chest drainage, emptying into a flexible collection device; the valve prevents return of gases or fluids into the pleural space. The Heimlich valve is less than 13 cm (5 inches) long and facilitates patient ambulation; it can be used in many patients instead of a traditional water seal drainage system.
ileocecal valve (ileocolic valve) the valve guarding the opening between the ileum and cecum.
mitral valve the cardiac valve between the left atrium and left ventricle, usually having two cusps (anterior and posterior). Called also bicuspid valve.
Valves of the heart. The right heart pumps the venous blood into the lungs. The oxygenated blood returns from the lungs into the left atrium and is propelled by the left ventricle into the aorta. The insets show closed valves: the tricuspid valve has three leaflets, whereas the mitral valve has two leaflets. The aortic and pulmonary artery valves have three leaflets and resemble one another except for the fact that the coronary arteries originate from behind the cusps in the aorta. From Damjanov, 1996.
posterior urethral valve any of various types of congenital folds across the proximal part of the male urethra near the seminal colliculus, the most common cause of urethral obstruction in male infants.
pulmonary valve (pulmonic valve) the pocketlike cardiac valve that protects the orifice between the right ventricle and the pulmonary artery.
pyloric valve a prominent fold of mucous membrane at the pyloric orifice of the stomach.
semilunar v's the cardiac valves that have semilunar cusps; see aortic valve and pulmonary valve.
thebesian valve coronary valve.
tricuspid valve the cardiac valve guarding the opening between the right atrium and right ventricle.
valve of vein (venous v's) any of the small cusps or folds found in the tunica intima of many veins, serving to prevent backflow of blood.

mi·tral valve

[TA]
the valve closing the orifice between the left atrium and left ventricle of the heart; its two cusps are called anterior and posterior.

mitral valve

n.
A valve of the heart, composed of two triangular flaps, that is located between the left atrium and left ventricle and regulates blood flow between these chambers. Also called bicuspid valve.

mitral valve

a bicuspid valve situated between the left atrium and the left ventricle; the only valve with two, rather than three, cusps. The mitral valve allows blood to flow from the left atrium into the left ventricle but prevents blood from flowing back into the atrium. Ventricular contraction in systole forces the blood against the valve, closing the two cusps and assuring the flow of blood from the ventricle into the aorta. The ventral cusp of the mitral valve is longer than the dorsal cusp. Also called bicuspid valve, left atrioventricular valve. Compare aortic valve, pulmonary valve, semilunar valve, tricuspid valve.
enlarge picture
Mitral valve

mi·tral valve

(mī'trăl valv) [TA]
The valve closing the orifice between the left atrium and left ventricle of the heart; its two cusps are called anterior and posterior.
Synonym(s): bicuspid valve.

mitral valve

The valve on the left side of the heart lying between the upper and lower chambers (ATRIUM and VENTRICLE). It has two cusps and is said to resemble a Bishop's mitre.

mitral valve

See BICUSPID (3).

Mitral valve

A fold in between the left atrium and the left ventricle of the heart that directs blood that has received oxygen from the lungs to the aortic valve and the aorta.

mi·tral valve

(mī'trăl valv) [TA]
Valve closing orifice between left atrium and left ventricle of heart; its two cusps are called anterior and posterior.

mitral valve,

n a bicuspid valve situated between the left atrium and the left ventricle; the only valve with two, rather than three, cusps. It allows blood to flow from the left atrium into the left ventricle but prevents blood from flowing back into the atrium.
mitral valve prolapse (MVP),
n the protrusion of one or both cusps of the mitral valve back into the left atrium during ventricular systole, resulting in incomplete closure of the valve. It may or may not be associated with mitral insufficiency (regurgitation) or a “leaky valve” and cause a heart murmur. Also called
“floppy” mitral valve. In most cases, it is harmless and does not cause symptoms or need to be treated. Symptoms include sensation of feeling the heart beat (palpitations), chest pain (unrelated to coronary artery disease or a heart attack), difficulty breathing after exertion, fatigue, cough, shortness of breath when lying flat (orthopnea). Some forms seem to be hereditary. It has been associated with Marfan syndrome, Graves' disease, and other disorders.

mitral

shaped like a miter; pertaining to the mitral valve.

mitral area
that area of the thoracic wall through which sounds of the mitral valve can best be auscultated; generally the lower one-third of the mid- to anterior left thorax.
mitral atresia-hypoplastic left heart syndrome
defects in the development of the mitral valve, left heart and aortic valve, which occur rarely in cats.
mitral complex
includes the leaflets, annulus, chordae tendineae and papillary muscles of the mitral valve, left atrium and left ventricular muscle wall.
mitral insufficiency
a functional incompetence resulting in regurgitation of blood from the left ventricle to the left atrium during systole or from the great vessels into the left atrium during diastole.
mitral regurgitation
see mitral insufficiency (above).
mitral valve
the left atrioventricular valve, the valve between the left atrium and the left ventricle of the heart; it is composed of two cusps, anterior and posterior. Called also the bicuspid valve.
mitral valve prolapse (MVP)
a condition in which some portion of the mitral valve is pushed back too far during ventricular contraction. Often a complication of mitral endocardiosis.
References in periodicals archive ?
Hamartoma of the mitral valve with blood cysts: a rare tumor detected by echocardiography.
Management of systolic anterior motion after mitral valve repair: an algorithm.
Aberrant mitral valve chordae and in particular on the AMVL are an extremely rare finding with only a handful of cases reported in the literature [1, 2, 4].
I wanted a second opinion and took advantage of my professional status to survey cardiologists on whom they would choose to do a mitral valve repair.
Mitral valve regurgitation causes the heart to work harder to pump blood to the rest of the body.
Histologic sections of the mitral valve showed multifocal erosions of the endothelium that contained large masses of fibrin admixed with pockets of degenerate neutrophils.
Additional analyses of the results broke the study into its two parts: the patients who also had mitral valve repair, and those who did not.
As long as the pumping function of your heart is normal, people with mitral valve prolapse or mild to moderate mitral regurgitation can exercise and are not precluded from competition.
Abstract: We have found that nanobacteria, recently discovered Gram-negative atypical bacteria, can cause local calciphylaxis on the mitral valve in a setting of high-calcium X phosphorous product in the blood.
John Brown at Riley Hospital for Children in Indianapolis may greatly improve the quality of life for patients who require replacement of the hardest working of the heart's four valves--the mitral valve on the left side of the heart.
He attributed a case of left vocal fold immobility to compression of the recurrent laryngeal nerve by a dilated left atrium in a patient with mitral valve stenosis.
The mitral valve is the heart valve between the left atrium and left ventricle.

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