Myocardial infarction (MI) is a major contributor to morbidity and mortality in China. The goal of this interventional, randomised controlled clinical trial is to evaluate the effectiveness and safety of a single administration of Nivolumab to the patients presenting with an acute anterior ST-segmental elevated myocardial infarction. Researchers will investigate if Nivolumab treatment can effectively and safely reduce infarct size as well as improve cardiac function of the patients with acute myocardial infarction.

The efficacy and safety of nivolumab as compared with placebo in the treatment of acute anterior ST segment elevation myocardial infarction are not known. In this phase 1/2, randomized, placebo-controlled, open-label trial, we randomly assigned adults with acute anterior ST segment elevation myocardial infarction to receive either nivolumab (5mg/kg for single administration) or placebo. The primary end points were difference in infarct size/LV mass% from baseline to 3 months after Nivolumab administration and the incidence of adverse events during 3 months after Nivolumab administration. Secondary end points included difference in LVEF%, LVESV/Body surface area, LVEDV/Body surface area, Trponin T and proBNP from baseline to 3 months after Nivolumab administration.