Myocardial bridging means that a part of a coronary artery passes through the heart muscle. The coronary arteries are blood vessels that bring oxygen-rich blood to the heart. Normally, they lie on top of the heart's surface. Myocardial bridging does not cause problems for most people. It can be a problem for some people if it limits blood flow. When the heart muscle contracts, it can squeeze the artery. This can stop some blood from getting to the heart muscle. In some cases, it can lead to a heart attack.

Most people who have myocardial bridging don't have any symptoms. If symptoms do occur, they may include chest pain or pressure or a strange feeling in the chest, back, neck, jaw, upper belly, or one or both shoulders or arms. There may also be shortness of breath, nausea, lightheadedness, or sudden weakness.

The symptoms of myocardial bridging may be treated with medicine. Some people have a procedure or surgery to improve blood flow in the artery.