Fig. 2. Plots relating individual values of R (load dependence of left ventricle pressure drop) to corresponding changes in dP/dt^maxwith leg elevation. On each plot, the data before (filled circles ) are compared with the data after (open triangles ) cardiopulmonary bypass (CPB). For desflurane and sevoflurane, the relationships are similar before and after CPB. With propofol both intercept as slope have changed after CPB. For the sake of clarity, the 95% confidence lines have not been drawn. * slope and intercept significantly different from pre-CPB.