Inhibition of Hsp70 by quercetin, an Hsp70 inhibitor, significantly increased myocardial infarct size (Figures 10(a) and 10(b)), serum cTnI (Figure 10(c)), and myocardial [Ca2+]i level (Figure 10(d)) during I/R-induced myocardial injury in rats. Here, TNNI3 is linked to infarction.