Can you have a heart attack, with out having blockage.
Hi Billy Templetom:
The most common cause of a heart attack is due to blockages, either from plaque or a blood clot. But there are some other uncommon causes of heart attacks, such as: a spasm of a coronary artery (drugs, such as cocaine, can cause such a life-threatening spasm), a tear in the heart artery (coronary artery dissection), and/or small blood clots or tumors that have traveled from other parts of the body (coronary embolism).
I've attached a link that gives you more information on causes: