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First Heart Sound - Loud

Virtual Auscultation

patient torso with stethoscope chestpiece
patient position during auscultation

The patient's position should be supine.

Lesson

Usually, the first heart sound is slightly louder than the second heart sound when heard in the Mitral valve area. In this case the first heart sound is much louder than the second heart sound. This can be produced by a thickened, but still mobile, mitral valve. Look at the anatomy video to see the thickened mitral valve leaflets. A very loud first heart sound can be an indication of mitral stenosis.

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 Reviewers

Authored by Dr. Jonathan Keroes, MD and David Lieberman, Developer, Virtual Cardiac Patient. Medically reviewed by Dr. Barbara Erickson, PhD, RN, CCRN. Last Update: 11/28/2021


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