Proximal Isovelocity Surface Area (PISA)
-Based on the following equation:

     2 * pi * Radius (cm)2 * Aliasing Velocity (cm/s)
     ----------------------------------------------------------
                    MRegurg Peak Velocity (m/s)

Radius (cm):                               
Aliasing Velocity (cm/s):           
Peak MRegurg Velocity (m/s):   



Effective Regurgitant Orifice Area (ERO) (cm2):   
Interpretation:  


   MRegurg Severity       Mild       Moderate       Severe   
ERO (cm2)
< 0.20
0.20 to 0.39
>= 0.40