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S3 Heart Sound
Manage episode 313651254 series 3279691
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The third heart sound, also known as the “ventricular gallop,” occurs just after S2 when the mitral valve opens, allowing passive filling of the left ventricle. The S3 sound is actually produced by the large amount of blood striking a very compliant LV.
A S3 heart sound is produced during passive left ventricular filling when blood strikes a compliant LV. If the LV is not overly compliant, as is in most adults, a S3 will not be loud enough to be auscultated. A S3 can be a normal finding in children, pregnant females and well-trained athletes; A S3 heart sound is often a sign of systolic heart failure, however it may sometimes be a normal finding.
S3 – “ventricular gallop”
- Occurs in early diastole
- Occurs during passive LV filling
- May be normal at times
- Requires a very compliant LV
- Can be a sign of systolic congestive HF
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