Decreased Intensity First Heart Sound Lesson

Auscultation of Decreased Intensity First Heart Sound

patient thorax when auscultating by stethoscope

patient position during auscultation
The patient was supine during auscultation.

Description

Abnormalities, such as a previous heart attack, decreased thyroid function, congestive heart failure, coronary artery disease, AV Blocks, cardiomyopathy, and mitral regurgitation. The anatomy video provides one example of such conditions.

In addition, thick chest walls can dampen the transmission of heart sounds, resulting in the observation of diminished heart sounds

Phonocardiogram

Anatomy

Decreased Intensity First Heart Sound

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

Authors and Reviewers

Sources

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