Figure 2: Left ventricular end-systolic pressure (LVESP) and end-diastolic pressure (LVEDP) of working hearts in the pacing and ISO treatment. (a) and (c) LVESP and LVEDP during the pacing. (b) and (d) LVESP and LVEDP in ISO treatment. Data are mean ± SEM, hearts for each ISO concentration in each group. * versus baseline.