Heartsounds in mitral regurgitation

cardiac auscultation , Cardiology , mitral regurgitation , notes , practical notes , Valvular heart disease

What are the causes of soft S1 in mitral regurgitation

It is due to the incomplete opposition of valve cusps
There is partial closure of mitral valve orifice at the onset of ventricular systoli

Causes of loud S1 in MR

Co-existing mitral stenosis
MVP – MR
MR due to papillary muscle dysfunction

What are the causes of left ventricular S3 in MR

It is due to elevated left ventricular end diastolic volume (LVEDV)
Due to left ventricular dysfunction – LV dysfunction