calculated left ventricular blood pressure maximum rate of positive change in left ventricular blood pressure 2013-07-31T15:24:11Z A calculated measurement that is used as an index to characterize the contractile ability of the heart. It is believed that maximum dP/dt is a reasonable index of the initial velocity of myocardial contraction. JSmith LV +dP/dt Max peak +LVdP/dt rate of maximum positive change in left ventricular blood pressure