How do you tell the severity of mitral valve stenosis?

Several ways: There are several ways to check how severe your mitral stenosis is. The most common and least invasive method is by transthoracic echocardiography, an ultrasound of the heart.

Different tests. : The main way of evaluating the heart is with ultrasound which is referred to as echo. It can estimate the pressure change across the valve. <5 mm hg mild. 5-10 moderate and >10 severe. Also we can measure blood pressure in the lungs if this is very high that is sign if severe stenosis. Recently cardiac MRI can be used to evaluate the heart too.