Table 3. Parameters of cardiac function in obese rat model. IVRT/RR: Isovolumetric relaxation time/R wave to R wave interval, MPI: Mechanical performance index, +dP/dt and -dP/dt, maximal slope of the systolic pressure increment and diastolic pressure decrement, respectively; MVO2: myocardial oxygen consumption. Mean ± SEM *p<0.05; **p<0.001; ***p<0.0001 compared with the age-matched control group; n=17-22. Metabolic and mechanical parameters n=4-6