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Auscultation Repetition Training: 629

Crackles - high-pitched (Rales)

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.

auscultation sound from lesson
waveform


Listening Tips

S1:
Systole:
S2:
Diastole:
Features:Brief, popping sounds that are high-pitched. Fine crackles are similar to wood burning in a fireplace. Crackles are more commonly heard during inspiration


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