in order to determine the precision with which currently used echocardiographic criteria can be applied for the diagnosis of mitral valve prolapse , three independent observers ( a , b , and c ) blindly analyzed the separate m-mode and two-dimensional echocardiograms of 50 patients , 27 of whom had previously been identified clinically as having echocardiographic evidence of prolapse .
C0026267
mitral valve prolapse
C0033377
prolapse