valve (valv) a membranous fold in a canal or passage that prevents backward flow of material passing through it. 
Valve
valve
valve [valv]
)
Valves of the heart.
aortic valve that guarding the entrance to the aorta from the left ventricle.
artificial cardiac valve a substitute, mechanical or composed of tissue, for a cardiac valve.
atrioventricular valves the valves between the right atrium and right ventricle (tricuspid v. ) and the left atrium and left ventricle (mitral v. ).
Béraud's valve a fold of mucous membrane sometimes occurring at the beginning of the nasolacrimal duct.
bicuspid valve mitral v.
bileaflet valve a heart valve prosthesis consisting of a circular sewing ring to which are attached two semicircular occluding disks that swing open and closed to regulate blood flow.
bioprosthetic valve an artificial cardiac valve composed of biological tissue, usually porcine.
caged-ball valve a heart valve prosthesis comprising a sewing ring attached to a cage composed of curved struts that contains a free-floating ball.
cardiac valves those controlling the flow of blood through and from the heart.
coronary valve that at the entrance of the coronary sinus into the right atrium.
flail mitral valve a cardiac valve having a cusp that has lost its normal support (as in ruptured chordae tendineae) and flutters in the blood stream.
Houston's valves permanent transverse folds, usually numbering three, in the rectum.
ileocecal valve , ileocolic valve that guarding the opening between the ileum and cecum.
mitral valve that between the left atrium and left ventricle, usually having two cusps (anterior and posterior).
pulmonary valve that at the entrance of the pulmonary trunk from the right ventricle.
pyloric valve a prominent fold of mucous membrane at the pyloric orifice of the stomach.
semilunar valve one having semilunar cusps, i.e., the aortic and pulmonary valves; sometimes used to designate the semilunar cusps composing these valves.
thebesian valve coronary v.
tilting-disk valve a heart valve prosthesis consisting of a sewing ring and a valve housing containing a suspended disk that swings between open and closed positions.
tricuspid valve that guarding the opening between the right atrium and right ventricle.
ureteral valve a congenital transverse fold across the lumen of the ureter, composed of redundant mucosa made prominent by circular muscle fibers; it usually disappears in time but may rarely cause urinary obstruction.
valve (v lv)n. 1. A membranous structure in a hollow organ or passage, as in an artery or vein, that folds or closes to prevent the return flow of the body fluid passing through it. 2. Any of various devices that regulate the flow of gases, liquids, or loose materials through piping or through apertures by opening, closing, or obstructing ports or passageways. 3. The movable control element of such a device. |
Valve
Tissue in the passageways between the heart's upper and lower chambers that controls passage of blood and prevents regurgitation.
Mentioned in: Balloon Valvuloplasty, Pulmonary Valve Stenosis
valve
[valv]
Etymology: L, valva, folding door
a natural structure or artificial device in a passage or vessel that prevents reflux of the fluid contents passing through it. Valves in veins are membranous folds that prevent backflow of blood. valvular, adj.
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.
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.
valve,
n a structure that controls flow of the contents of a canal or passage.
valve, exhalation,
n a valve that permits escape of exhaled gases into the atmosphere and prevents them from being rebreathed.
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
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.
valve
1. A flapped or flap-like structure. See Aortic valve, Bicuspid valve, Bioengineered heart valve, Bioprosthetic valve, Ileocecal valve, Mitral valve, Pulmonary valve, Ross pulmonary porcine valve, Safe-Connect™ valve, Shiley heart valve, Tricuspid valve2. A device intended to limit the flow, or prevent the reversal of flow of a liquid or gas from point A to point B
Patient discussion about valve.
Q. How does alcohol affect someone who has been diagnosed with aortic valve stenosis? My brother has been diagnosed with aortic valve stenosis and also is a smoker and does drink alcohol on the weekends. He knows that he should stop smoking but what about the effects of alcohol? Does this also contribute to his stenosis?
A. Alcohol changes blood pressure and speed of the heart- that is not a good idea if you have an Aortic stenosis. Could probably makes things worst. I would avoid alcohol… but he should ask GP.
Q. Please discuss depression following aortic valve replacement
A. i don't know about valve replacement but a good friend of the family had to do an open heart surgery and he was definitely in depression. he took it very hard, he had heart problems and changed his whole life routine , did everything "right" in order to stop it's progression and then this surgery came. but fortunately he has a great family that supports him and many friends too. it took some time but he came out of it.
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