Information for the public
What is a heart attack?
The coronary arteries are the blood vessels that supply the heart muscle with blood. A heart attack happens when one or more of these arteries become blocked. This damages the heart muscle, and is called a myocardial infarction.
The blockage is usually caused by a small blood clot in a coronary artery that has been narrowed by a build-up of fatty deposits in its walls. This condition is called coronary artery disease.
If you have already had a heart attack, you are at risk of having another one because of the disease in your coronary arteries.
However, there are steps you can take to reduce your risk of having another heart attack, and some of these are covered here.