An ostium primum atrial septal defect (ASD) occurs when then atrial septum near the atrioventricular valves has a communication between the two atrium causing a left to right shunt. This rarely ...

also called the AV node, located near the center of the heart between the atria and the ventricles. These electrical impulses keep your blood flowing in proper rhythm. The heart has four valves ...

Atrioventricular and semilunar valve abnormalities are common birth defects, but how cardiac valvulogenesis is directed remains largely unknown. During studies of genetic interaction between Egfr ...

If the left ventricle is noncompliant, and atrial contraction forces blood through the atrioventricular valves, a S4 is produced by the blood striking the left ventricle. CLINICAL PEARL ...