SIRT3 and myocardial infarction: In the present study, the loss of SIRT3 did not additionally augment myocardial infarct size or worsen cardiac systolic function in 8‐week‐old mice exposed to I/R injury, which was consistent with the finding that 10‐week‐old SIRT3‐deficient mice did not show worsened cardiac function or expanded myocardial infarct sizes than wild‐type mice exposed to I/R injury.34