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First Heart Sound - Decreased Intensity Reference Guide

First Heart Sound - Decreased Intensity

A decreased intensity first heart sound can be produced by various heart abnormalities, such as a viral infection of the heart called a cardiomyopathy. Other conditions include a previous heart attack and decreased thyroid function. The decreased intensity first heart sound is due to a decrease in the vigor of contraction of the left ventricle. See the anatomy video.


Auscultation Sound From Lesson

auscultation sound from lesson
waveform


First Heart Sound - Decreased Intensity | Reference Page #41
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