Angina pectoris, commonly known as angina, is the sensation of chest pain, pressure, or squeezing, often due to ischemia of the heart muscle from obstruction or spasm of the coronary arteries. While angina pectoris can derive from anemia, abnormal heart rhythms and heart failure, its main cause is coronary artery disease, an atherosclerotic process affecting the arteries feeding the heart. The term derives from the Latin angere ("to strangle") and pectus ("chest"), and can therefore be translated as "a strangling feeling in the chest".