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:Course crackles are discontinuous, brief, popping sounds. Similar to the sound of a hook and loop fastener being pulled apart. They have also been described as a bubbling sound. More common during inspiration