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
- Co-existing mitral stenosis
- MVP – MR
- MR due to papillary muscle dysfunction
- It is due to elevated left ventricular end diastolic volume (LVEDV)
- Due to left ventricular dysfunction – LV dysfunction