Auscultation in Primary Care

Third and Fourth Heart Sound Gallop C31 - Auscultation Lesson

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.

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The patient's position is supine.

Third and Fourth Heart Sound Gallop C31 - Auscultation Lesson

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Observe