Severity of mitral stenosis is determined by :
Since there is mitral stenosis, more time for blood to enter LV. Therefore, increased transient time, so increase duration of murmur of S1 sound can be loud or soft. If sound is soft it tells us about calcified mitral valves but not of severity
Intensity of S1 hea sound
Diastolic murmur duration
Opening snap
Intensity of diastolic murmur
Murmurs