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 tab.
|
After reviewing the sound, use the waveform and anatomy tabs for more information about this sound.