Explanation
1) the more stenosed the valve, the smaller the diameter, the shorter duration it needs to close, the shorter will be the opening snap.
2) the more left atrial end diastolic pressure, the more forces pushing blood from the LA to the LV at the end of diastole and therefore the less effects you have of a stenosed valve
1) the more stenosed the valve, the smaller the diameter, the shorter duration it needs to close, the shorter will be the opening snap.
2) the more left atrial end diastolic pressure, the more forces pushing blood from the LA to the LV at the end of diastole and therefore the less effects you have of a stenosed valve