Signin or Join using link above

Second Heart Sound - Physiologically Split

The second heart sound (S2) is created by the closing of the aortic valve followed by the closing of the pulmonic valve. Careful analysis of the splitting and intensity of the second heart sound can indicate the presence of many cardiac abnormalities. This example shows normal physiological splitting of the second heart sound. Splitting varies between zero and eighty milliseconds depending on the phase of the respiratory cycle. The aortic component of S2 (S2A) precedes the pulmonic component (S2P).


patient torso with stethoscope chestpiece
patient position during auscultation
The patient's position should be supine.

static waveform for 20


static waveform for 20


An error has occurred. This application may no longer respond until reloaded. Reload 🗙