Fig. 5.

(A) Change in the postinfarction compensatory response with the administration of nitroglycerin, including: measured heart rate ($HR$), computed systemic vascular resistance ($SVR$), fitted end-systolic elastance of the non-infarcted region $E_n$, and fitted stressed blood volume ($SBV$). The change in computed mean arterial pressure ($MAP$) from postinfarction is also shown. (B) Change in the postinfarction compensatory response with the administration of dobutamine. For both nitroglycerin and dobutamine, no change is indicated by the gray dashed line and a significant mean change for all animals is indicated by a dark solid line (p < 0.05). Paired parametric t-tests were performed on all metrics except $MAP$, which failed the normality test and was analyzed with a Wilcoxon matched-pairs signed rank test.