APPLIED RADIOLOGICAL ANATOMY

Detailed explanation-1: -Ischemia is the restricted blood supply to a tissue or organ caused by an obstruction or the narrowing of a blood vessel. From: Disease Pathways, 2020.

Detailed explanation-2: -Ischemia is an absolute or relative shortage of the blood supply to an organ, i.e. a shortage of oxygen, glucose and other blood-borne fuels. A relative shortage means the the blood being supplied is inadequate to maintain tissue metabolism. Ischemia results in tissue damage because of a lack of oxygen and nutrients.

Detailed explanation-3: -Supply/Demand Relationships Ischemia occurs as a consequence of an imbalance between oxygen supply and oxygen demand. This can occur because of a fixed limitation in oxygen supply from an atherosclerotic plaque in a coronary artery that produces a 75% or greater luminal narrowing.