The reason for angina pectoris is coronary artery (the blood vessels supplying oxygen and nutrients for the heart) stenosis that makes the blood supply for the heart relatively or absolutely reduce.

Usually the relative blood supply insufficiency refers to the significantly increase of cardiac activities, if the heart rate increases and the shrinkage force enhances, etc., the heart oxygen demand will increase, making the amount of the actual blood supply seems inadequate.

Usually the absolute blood supply insufficiency refers to the coronary artery stenosis has reached to a very severe degree; in the life the encounter of some incentives, such as sleep nightmares, emotional wave, climate change, cultural and entertainment activities, etc. all can result in sudden angina attack.

Either of blood supply insufficiencies will cause suddenly cardiac ischemia and severe arrhythmia to happen sudden death; it may arise acute myocardial infarction due to prolonged ischemia.

The reason for angina pectoris is insufficient blood supply edited by Heart Problems, all rights reserved, Do not copy or revise without our permission.