Something caused the heart attack like a blood clot or blockage in the
artery. I am not sure why the
nurse would tell him to quit taking the heart
medication is very important. Did he die of a heart attack? Now, it is important for you to know your cholesterol levels, make sure that you are eating healthy. LDL levels should be 100 or below, HDL for men 40's, for women 50's, triglycerides below 150.