Sexual Activity as a Cardiac Risk Factor Overall, the risk of myocardial infarction during sexual activity is negligible. Although maintaining sexual activity has been reported to have potential health benefits, it can trigger myocardial infarction (MI), arrhythmia, or sudden death in a very small minority of patients. The Myocardial Infarction Onset Study (MIOS) enrolled 1,712… Read more: Cardiovascular Response to Sexual Activities