CLINICAL MEDICINE

Detailed explanation-1: -In cardiology, hibernating myocardium is a state when some segments of the myocardium exhibit abnormalities of contractile function. These abnormalities can be visualised with echocardiography, cardiac magnetic resonance imaging (CMR), nuclear medicine (PET) or ventriculography.

Detailed explanation-2: -Hibernating myocardium occurs in people with coronary artery disease. It happens when a severely clogged coronary artery limits blood flow to heart muscle tissue over a long period of time. A stunned myocardium occurs when blood flow is reduced suddenly.

Detailed explanation-3: -Definitions: Stunned myocardium is viable myocardium salvaged by coronary reperfusion that exhibits prolonged postischemic dysfunction after reperfusion. Hibernating myocardium is ischemic myocardium supplied by a narrowed coronary artery in which ischemic cells remain viable but contraction is chronically depressed.

Detailed explanation-4: -Hibernating myocardium has also been diagnosed by assessing contractile reserve, usually using echocardiography or magnetic resonance imaging (MRI) and low‐dose dobutamine. A region of the myocardium not initially contracting may contract when stimulated inotropically by low‐dose dobutamine.