Third and Fourth Heart Sound Gallop

Both the third and fourth heart sounds (S3 and S4) are low frequency. S4 is lower than S3.

This is a pattern that occurs with improvement of heart failure. That is, an S3 pattern gives way to an S3 S4 pattern as the patient improves.

Third and Fourth Heart Sound Gallop
Position: Mitral
Chestpiece: Bell


maneuver
Maneuver: Supine

Phonocardiogram

waveform

Cardiac Animation

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