Coronary artery disease (ischemic heart disease) develops as a result of narrowing or occlusion of the blood vessels that feed the heart.
ECG, or electrocardiogram, is the process of recording and analyzing electrical activity produced by heart cells that enables the heart to function.
Atherosclerosis is a disease caused by narrowing and hardening of the blood vessels due to the accumulation of plaques in the artery.
Angiography is an examination of blood vessels under X-rays using a kind of medical dye. It is performed by physicians in the angio laboratories.
Ischemia is a serious condition in which blood flow to any organ in the body is stopped. During ischemia, blood vessels providing oxygen to brain, is blocked.