What Is The S2 Heart Sound _top_ File

S2 occurs at the beginning of isovolumetric ventricular relaxation. As the ventricles finish contracting, the pressure within them drops below the pressure in the great vessels (the aorta and pulmonary artery). This pressure gradient causes blood to flow back toward the heart, forcing the semilunar valves to snap shut.

A "wide" split implies that $A_2$ and $P_2$ are separated even during expiration, and the split widens further on inspiration. what is the s2 heart sound

While commonly attributed to the "slapping" of the valve leaflets, the sound is more precisely caused by the sudden deceleration of columns of blood, which throws the valve leaflets and adjacent cardiac structures into vibration. 2. Components of S2: A2 and P2 S2 occurs at the beginning of isovolumetric ventricular