semilunar valve


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sem·i·lu·nar valve

[TA]
a heart valve composed of a set of three semilunar cusps (valvules); hence both the aortic and pulmonary valves are semilunar valves.
Synonym(s): valvula semilunaris [TA]

semilunar valve

n.
Either of two valves, one located at the opening of the aorta and the other at the opening of the pulmonary artery, each consisting of three crescent-shaped cusps and serving to prevent blood from flowing back into the ventricles.

semilunar valve

[-lo̅o̅′nər]
Etymology: L, semi + luna, moon, valva, folding door
1 a valve with half-moon-shaped cusps, such as the aortic valve and the pulmonary valve.
2 any one of the cusps constituting such a valve.
3 simple cuplike valves found in the venous and lymphatic vessels. See also heart valve, mitral valve, tricuspid valve.
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Semilunar valves

sem·i·lu·nar valve

(sem'ē-lū'năr valv) [TA]
A heart valve composed of a set of three semilunar cusps (valvules); hence, both the aortic and pulmonary valves are semilunar valves.

semilunar valve

either of the heart valves
  1. (a) at the orifice of the pulmonary artery, or
  2. (b) at the orifice of the aorta. Each consists of three flaps which ensure that blood flows in only one direction.

semilunar

shaped like a half-moon or crescent.

semilunar valve
valve guarding the entrances into the aorta and pulmonary trunk from the cardiac ventricles.
semilunar valve anomaly
abnormal development causes an irregular central perforation of the valve and the signs of valvular stenosis.
References in periodicals archive ?
It was found that the semilunar valves were poorly vascularized.
DORV morphology should be characterized by an exact description of the ventricular septal defect (VSD) in relationship to the semilunar valves, of the great arteries to each other, the presence of pulmonary outflow tract obstruction or aortic outflow tract obstruction, the tricuspid-pulmonary annular distance, finally the presence of other, associated cardiac pathology (2).
It is the result of incomplete separation of the aortopulmonary trunk, even though the differentiation of the semilunar valves is completed; the presence of the semilunar valves is necessary to differentiate diagnosis from persistent truncus arteriosus (6).
Even though both arise from the same embryologic origin, the supportive structures of semilunar valves and annulus are different.