bicuspid valve


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Related to bicuspid valve: aortic valve, tricuspid valve, Aortic semilunar valve

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.

bicuspid valve

bicuspid 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.

valve

(valv) [L. valva, leaf of a folding door]
Any of various membranous structures in a hollow organ or passage that temporarily close to permit the flow of fluid in one direction only.

aortic valve

Abbreviation: AoV
The valve at the junction of the left ventricle and the ascending aorta. It is composed of three segments (semilunar cusps) and prevents regurgitation. See: cardiac valve for illus.

Bauhin valve

See: Bauhin valve

Béraud valve

See: Béraud valve

bicuspid valve

Mitral valve.

Bjork-Shiley heart valve

A synthetic artificial heart valve that is no longer commercially available but remains implanted in thousands of patients. The valve has been known to fracture at its struts during use, which results in death in the majority of cases.
Enlarge picture
CARDIAC VALVES: with ventricles relapsed

cardiac valve

Any of the four valves that prevent the backflow of blood as it passes into, through, and out of the heart. In order of the entry of the venous blood into the right atrium, they are the tricuspid, pulmonary, mitral, and aortic. See: illustration

Carpentier-Edwards valve

See: Carpentier-Edwards valve.

check valve

A valve that permits fluids or gases to flow in just one direction. Check valves are used in infusion sets to prohibit backflow of fluids during intravenous therapy.

coronary valve

The coronary sinus valve at the entrance of the coronary sinus into the right atrium. Synonym: thebesian valve

eustachian valve

The valve at the entrance of the inferior vena cava.

external nasal valve

The outermost opening of the nose (the alar rim).

flutter valve

A one-way valve used in chest tube drainage systems that allows fluids or gases to flow out of the chest, but does not let them reenter the body
Synonym: Heimlich flutter valve; Heimlich valve

Gerlach valve

See: Gerlach valve

high-pressure relief valve

A safety device built into a ventilator circuit that protects the patient from excessively high airway pressures by venting excess pressure into the atmosphere.

Houston valve

See: Houston valve

Huschke valve

Lacrimal plica.

ileocecal valve

A projection of two membranous folds of the ileum of the small intestine into the cecum of the colon. It prevents backup of fecal material into the small intestine.
Synonym: valvula coli

inspiratory impedance threshold valve

See: inspiratory impedance threshold valve

internal nasal valve

Nasal valve.

Krause valve

See: Krause, Karl

left atrioventricular valve

Mitral valve.

mitral valve

The valve that closes the orifice between the left cardiac atrium and the left ventricle during ventricular systole.
Synonym: bicuspid valve; left atrioventricular valve

nasal valve

The site of greatest obstruction to airflow through the nasal passages. It extends from the bony cave near the piriform aperture into part of the cartilaginous vestibule of the nose. Synonym: internal nasal valve

pop-off valve

A safety valve that releases gas into the atmosphere from a ventilator circuit when the pressure in the circuit exceeds a known, safe level.
Enlarge picture
TYPES OF MECHANICAL HEART VALVES: A. caged ball valve; B. monoleaflet. C. bileaflet

prosthetic heart valve

A substitute valve used to replace a diseased valve. There are two main types of prostheses: those made from biological tissues, e.g., the heart valves of animals, esp. pigs, and those made from biocompatible materials, e.g., metals or polymers. Biocompatible mechanical valves may be constructed in a variety of ways, e.g., from a ball that moves up and down in a cage; with bileaflet valves that close in the midline; or with a single leaflet (which tilts to open and close). See: illustration

pulmonary valve

The valve at the junction of the right ventricle and pulmonary artery. It is composed of three semilunar cusps and prevents regurgitation of blood from the pulmonary artery back into the right ventricle. See: cardiac valve for illus.

pyloric valve

The prominent circular membranous fold at the pyloric orifice of the stomach. Synonym: valvula pylori

reducing valve

A device to reduce the pressure of gas that has been compressed in a cylinder.

right atrioventricular valve

Tricuspid valve.

semilunar valve

The type of valve separating the heart and aorta and the heart and pulmonary artery. See: cardiac valve for illus.

thebesian valve

Coronary valve.

tricuspid valve

Abbreviation: TV
The valve that closes the orifice between the right cardiac atrium and right ventricle during ventricular systole. Synonym: right atrioventricular valve; valvula tricuspidalis See: cardiac valve for illus.

valve of Varolius

Ileocecal valve.

valve

1. a membranous fold in a canal or passage that prevents backward flow of material passing through it.
2. a mechanical device to regulate the flow of liquid or gas from an area of higher pressure to one of lower pressure.
3. automatic valve which maintains a steady vacuum in the system of a mechanical milking machine.

Adam's pressure reducing valve
see reducing valve (below).
aortic valve
see aortic valve.
atrioventricular v's
the valves between the right atrium and right ventricle (tricuspid valve) and the left atrium and left ventricle (mitral valve).
bicuspid valve
mitral valve.
cardiac v's
valves that control flow of blood through and from the heart. See also aortic valve, mitral valve, pulmonary valve, tricuspid valve.
coronary valve
a valve at entrance of the coronary sinus into right atrium.
flair valve
a cardiac valve having a cusp that has lost its normal support (as in ruptured chordae tendineae) and flutters in the bloodstream.
ileocecal valve, ileocolic valve
see ileocecal valve.
nonreturn valve
in anesthetic circuits, it prevents exhaled gas from returning to the patient.
portal valve
regulates the amount of venous blood entering the kidney.
pressure reducing valve
see reducing valve (below).
pyloric valve
a prominent fold of mucous membrane at the pyloric orifice of the stomach.
reducing valve
a special valve used on anesthetic machines and which reduces the pressure of the gas reaching the exit valve so that control of the flow is made easier. Called also regulator.
semilunar v's
valves made up of semilunar segments or cusps (valvulae semilunares), guarding the entrances into the aorta and pulmonary artery.
thebesian valve
coronary valve.
valve tube
a thermionic diode that permits the flow of electric current in an x-ray machine in only one direction.
References in periodicals archive ?
Among the former, the congenitally bicuspid valve unassociated with infective endocarditic was the problem in 59 patients, 22 (37%) of whom had resection of portions of the dilated ascending aorta.
Infective endocarditis more commonly involves a three-cuspid aortic valve than a two-cuspid one because the tricuspid valve is so much more common than the bicuspid valve (28).
The unicuspid valves were the heaviest, the bicuspid valves the next heaviest, and the tricuspid aortic valves, the lightest.
Not only did the valve weights vary according to valve structure (unicuspid > bicuspid > tricuspid), but often there was variation in individual cusps among patients with bicuspid valves and among patients with tricuspid valves (15, 16).
Of unicuspid valves, 37 (30%) of 124 valves in men and 5 (11%) of 44 in women reached this weight; of bicuspid valves, 96 (18%) of 521 valves in men and 4 (2%) of 236 valves in women reached this weight (unpublished data).