Third and Fourth Heart Sound Gallop Reference Guide.
Third and Fourth Heart Sound GallopBoth 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.
Auscultation Sound From Lesson
Patient Recording - Half Speed Playback
The patient's position should be supine.
Diastole: S3 and S4 present; galloping sound
Third and Fourth Heart Sound Gallop - Reference Page