A functional murmur of tricuspid regurgitation

In mitral stenosis severe cases there is a functional murmur of tricuspid regurgitation which is pan systolic murmur…so u can hear the

  1. Mid diastolic murmur of ms

2.opening snap

3.pan systolic murmur (due to functional tr)

So the ans is mid systolic click

Due to progressive severe MS: pressure build up in Pulm Artery and in RV and eventually lead to Functional Tricuspid regurgitation (as there’s no pathology in Tricuspid valve). And this TR cause Pan systolic murmur