atrioventricular valve


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Related to atrioventricular valve: atrioventricular node, tricuspid valve

atrioventricular valve

[¦a·trē·ō‚ven′trik·yə·lər ′valv]
(anatomy)
A structure located at the orifice between the atrium and ventricle which maintains a unidirectional blood flow through the heart.
References in periodicals archive ?
The results of our study support the literature findings on that with the bicaval anastomosis technique the right atrial anatomy can be better protected, the sinus node dysfunction and atrioventricular valve insufficiency are observed less.
Intracellular collagen fibrils in prolapsed ("floppy") human atrioventricular valves.
Common atrium, a rare congenital malformation, has many similarities with the more usual atrioventricular septal defect limited to the lowermost portion of the atrial septum: a left-toright shunt; an identical type of common atrioventricular valve that may have only one orifice (5) but usually has right and left orifices (3, 5, 6), either or both of which may be incompetent; and a rather characteristic electrocardiogram showing right ventricular enlargement, left anterior fascicular block and, in 50% of patients, a long P-R interval (7, 8).
They are particularly associated with atrial septal defects and with severe atrioventricular valve regurgitation.
On occasion, an atrioventricular valve has been so traumatized by the tumor's prolapsing through it during ventricular diastole that valve excision and replacement are necessary.