Related Experiment Videos
Hibernating myocardium: a historical perspective
1Department of Medicine, University of Southern California, Los Angeles.
Insights
Hibernating myocardium is a heart condition with persistent dysfunction due to reduced blood flow. This dysfunction is an adaptive mechanism that improves when blood flow is restored, preventing permanent heart damage.
Area of Science:
- Cardiology
- Physiology
Background:
- Hibernating myocardium is characterized by persistent left ventricular dysfunction at rest.
- This dysfunction is linked to severely reduced coronary blood flow.
Purpose of the Study:
- To review the evolution of the concept of hibernating myocardium.
- To examine proposed underlying mechanisms of myocardial hibernation.
Main Methods:
- Literature review of clinical observations and proposed mechanisms.
- Analysis of studies on myocardial and left ventricular function.
Main Results:
- Myocardial dysfunction in hibernating myocardium is likely an adaptive mechanism.
- Dysfunction improves upon restoration of coronary blood flow, preventing irreversible damage.
Conclusions:
- Hibernating myocardium represents a state of preserved myocardial viability despite chronic dysfunction.
- Understanding hibernation is crucial for managing ischemic heart disease.
Abstract:
Hibernating myocardium refers to the presence of persistent myocardial and left ventricular dysfunction at rest, associated with conditions of severely reduced coronary blood flow. This left ventricular dysfunction probably represents an adaptive mechanism preventing irreversible myocardial cell damage, since myocardial and left ventricular dysfunction in hibernating myocardium improve following the restoration of coronary blood flow. This review examines the evolution of the concept of hibernation from a clinical observation of the potential underlying mechanisms recently proposed.