Auscultation Repetition Training: 147
Crackles - Early Inspiratory (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.
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
