A heart attack, also called a myocardial infarction, can be fatal, but with urgent treatment prognosis is great.
A heart attack occurs when the flow of blood to the heart is interrupted. The blockage is most often as a result of buildup of fat, cholesterol and other substances, which form a plaque in the arteries that feed the heart (coronary arteries).
The plaque eventually dislodges and forms a clot. The interrupted blood flow can damage or destroy part of the heart muscle.
It’s crucial to seek emergency medical help if you think you might be having a heart attack.