Research studies have demonstrated that listening to a heart sound for 2-3 minutes can help students master auscultation.
For textual descriptions, waveforms and heart animations, please use our courses on this website.
S1: Systole: S2: Diastole: Features:Ask patient to whisper 1-2-3 several times. Auscultate chest walls. Over healthy lung areas, '1-2-3' is not intelligible