Fig. 6. Plot relating changes in dP/dt^maxwith leg elevation to corresponding changes in end-diastolic pressure (EDP) in a group of 250 patients (open squares) sampled from previous observations. A wide spectrum of responses to leg elevation can be observed ranging from a major decrease in dP/dt^maxand increase in EDP over no change to an increase in dP/dt^max and either no change or a minor increase in EDP. The patients of the present study are superposed on this plot (filled dots).