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Loud First Heart Sound Lesson

Virtual Auscultation

patient torso with stethoscope chestpiece

patient position during auscultation
The patient's position is supine.

Lesson

This heart sound lesson is also found in the 'Normal Heart Sounds' module.

The first heart sound is usually slightly louder than the second when auscultating at the mitral valve (apex).

The first heart sound is much louder than the second heart sound in this case. A thickened but still movable mitral valve is generating this particular sound. Look at the anatomy video to see the thickened mitral valve leaflets.

Loud first heart sounds can also be observed in patients with thin chests.

Waveform




Heart Sounds Video

Notice the thickened mitral valve leaflets. The first heart sound is much louder than the second heart sound. This can be produced by a thickened, but still mobile, mitral valve.


Authors and Sources

Authors and Reviewers

Sources

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