Concept and evaluation of hibernating myocardium

Area of Science:

• Cardiology
• Cardiovascular Physiology

Background:

• Hibernating myocardium describes impaired heart function at rest caused by reduced coronary blood flow.
• This condition represents a regulated adaptation of cardiac tissue to its environment.
• It is observed in various cardiac conditions, including angina, myocardial infarction, and heart failure.

Purpose of the Study:

• To define hibernating myocardium and its diagnostic criteria.
• To outline common diagnostic tests for identifying viable myocardium.
• To review the impact of revascularization on cardiac function.

Main Methods:

• Diagnosis involves confirming resting left ventricular dysfunction.
• Viability assessment of myocardial tissue is crucial.
• Common diagnostic tools include dobutamine echocardiography, 201Tl isotope studies, and positron emission tomography.

Main Results:

• Hibernating myocardium is a state of adaptive cardiac dysfunction.
• Diagnostic methods confirm both impaired function and myocardial viability.
• Revascularization strategies can reverse or improve cardiac dysfunction.

Conclusions:

• Hibernating myocardium is a distinct clinical entity requiring specific diagnostic approaches.
• Identifying viable myocardium is key to successful treatment.
• Revascularization offers a therapeutic option to restore cardiac function.