Myocardial bridges do not usually cause sudden death, but if a severe crush occurs resulting in severe myocardial ischemia there is a possibility of sudden death. A myocardial bridge is a bundle of myocardial fibers in the heart. While coronary arteries normally travel in the connective tissue beneath the epicardium, if a segment of a coronary artery travels within the myocardium, this bundle of myocardial fibers is referred to as a myocardial bridge, and the coronary artery that travels beneath the bridge is referred to as a mural coronary artery. Since the mural coronary arteries are squeezed during every cardiac contraction, a severe squeeze of the mural coronary arteries can cause ischemia of the distal myocardium, which can result in angina-like symptoms, arrhythmia, or even myocardial infarction or sudden death; therefore, a severe squeeze may result in sudden death. Once diagnosed with this disease, unless absolutely necessary, should avoid the use of nitrate drugs and dopamine and other positive inotropic drugs; the need for timely medical treatment, under the guidance of a professional physician for standardized treatment, do not take the liberty of dealing with, to avoid adverse consequences.