Final answer:
The abnormal mitral valve pressure half-time for patients with mitral valve stenosis ranges from 90 to 400 msec, indicating the severity of stenosis.
Step-by-step explanation:
The abnormal mitral valve pressure half-time for patients with mitral valve stenosis is usually in the range of 90 to 400 milliseconds (msec). Mitral valve stenosis is a condition where the mitral valve does not open fully, restricting blood flow from the left atrium to the left ventricle.
The pressure half-time is a measurement used during an echocardiogram to estimate the severity of the stenosis. It is the time it takes for the pressure differential across the valve to decrease by half after the valve closure, which corresponds to how quickly the blood passes through the narrowed valve.