What - Is The S2 Heart Sound

Paradoxical splitting occurs when $A_2$ follows $P_2$. Because $P_2$ is softer and normally follows $A_2$, paradoxical splitting sounds like a single sound on expiration that splits into two sounds on inspiration—however, the sequence is reversed ($P_2$ first, then $A_2$).

If the split is —meaning the valves close in reverse order (P2 before A2) and the split narrows on inspiration instead of widening—that could murmur of left bundle branch block or aortic stenosis . The left ventricle struggles to finish its squeeze, so A2 arrives late. what is the s2 heart sound

But S2 tells stories of illness, too.

The , often described as the "dub" in the rhythmic "lub-dub" of a heartbeat, is a high-pitched sound produced by the closure of the semilunar valves—the aortic valve and the pulmonic valve . It marks the end of ventricular contraction (systole) and the beginning of the heart's relaxation and filling phase (diastole). The Two Components of S2: A2 and P2 Paradoxical splitting occurs when $A_2$ follows $P_2$