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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






Position

Patient position
The patient's position should be supine.

Listening Tips

S1: Reduced intensity
Systole:
S2:
Diastole:


Observe

A decrease in the vigor of contraction of the left ventricle causes decreased intensity first heart sound.

First Heart Sound - Decreased Intensity - Reference Pag

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