Third and Fourth Heart Sounds

Description

This record will help you to detect the presence of a fourth heart sound. A fourth heart sound is heard late in diastole, just before the next first heart sound. A fourth heart sound is an important indicator of poor ventricular function. A third heart sound has a rhythm similar to "Kentucky" and a fourth heart sound rhythm is similar to "Tennessee." A third heart sound has a slightly lower frequency than the first and second heart sounds. The fourth heart sound is even lower than the third. 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 Heart Sound Present
Fourth Heart Sound Present

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