Patients who have had bypass surgery can resume sexual activity safely after first two weeks after an uncomplicated heart attack, most people are at high risk of heart-related problems during sex as a result of a rise in the heart rate and blood pressure. However, this risk becomes much smaller by six weeks after the heart attack. Patients with complications of a heart attack, such as recurrent chest pain, abnormal heart rhythms or heart failure are at intermediate or high risk of heart-related problems during sex. People in these risk groups need further evaluation and/or treatment before attempting to have sex.