Crackles - Early Inspiratory (Rales) 147 Auscultation Practice

Crackles - Early Inspiratory (Rales) 147

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:Occur early in inspiration. Can be lower-pitched than late inspiratory crackles. Coughing may decrease or clear these crackles


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Sv: 1 ; 7/30/2026 10:41:40 PM




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