What is the term used to describe inadequate blood supply that decreases availability of oxygen to the myocardium?

Myocardial ischemia is the term that specifically describes a condition where there is an inadequate blood supply to the heart muscle (myocardium), which leads to a decreased availability of oxygen. This lack of oxygen can cause chest pain (angina) and, if prolonged, can result in more severe damage to the heart muscle, potentially leading to myocardial infarction (heart attack). The condition typically arises from the narrowing of coronary arteries due to atherosclerosis or other factors that restrict blood flow.

In contrast, cardiac arrest refers to the sudden stopping of the heart's pumping function and is characterized by the cessation of effective blood circulation, but it does not specifically address the gradual decrease in blood supply leading to ischemia. Cerebral ischemia involves inadequate blood flow to the brain, and hemorrhagic shock pertains to insufficient blood circulation due to significant blood loss, impacting overall perfusion but not specifically targeting the myocardium.