Would you like a similar review of S2, splitting patterns, or murmurs?
S1 is generated by the sudden closure of the —the mitral valve and the tricuspid valve —at the onset of ventricular systole.
The first heart sound, , is the familiar "lub" in the heart’s "lub-dub" rhythm. It signals the official start of systole —the phase when your heart contracts to pump blood to the rest of the body. 💓 The Basics: What is S1?