echocardiography: diastolic inflow time-velocity integral (TVI) for mitral valve
echocardiography: diastolic inflow time-velocity integral (tvi) for mitral valve
echocardiography: diastolic inflow time-velocity integral (TVI) for mitral valve (procedure)
echocardiography: diastolic inflow time-velocity integral (tvi) for mitral valve (procedure)