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Auscultation Repetition Training: 31

Crackles - Coarse (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: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


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