KR-32568 is a sodium/hydrogen exchanger 1 (NHE-1) inhibitor (IC50: 230 nM). KR-32568 exhibits potent cardioprotective effects. When used at a concentration of 10 μM, it restored cardiac systolic function in an isolated ischemic rat heart model. KR-32568 (0.3 mg/kg) reduced the size of myocardial infarction in a rat model of ischemia and reperfusion injury.