Myocardial stunning
Myocardial Stunning
Myocardial stunning (pronunciation: my-o-car-dial stun-ning) is a temporary and fully reversible condition where the heart muscle (myocardium) temporarily loses its ability to contract even though it is still alive and can recover completely.
Etymology
The term "myocardial stunning" is derived from the Greek words "myo" meaning muscle, "kardia" meaning heart, and the English word "stunning" which refers to the temporary loss of function.
Definition
Myocardial stunning is a phenomenon where the heart muscle cells are temporarily damaged due to a severe reduction in blood supply (ischemia). This can occur after a heart attack or after a procedure that temporarily stops the blood supply to the heart, such as coronary angioplasty. Despite the restoration of blood flow, the heart muscle does not immediately regain its full function, leading to a period of reduced contractility.
Symptoms
Symptoms of myocardial stunning can include chest pain, shortness of breath, fatigue, and irregular heartbeats. However, it is often asymptomatic and may only be detected through diagnostic tests such as an echocardiogram or cardiac MRI.
Related Terms
- Ischemia: A condition in which there is insufficient blood flow to the body's tissues.
- Reperfusion: The restoration of blood flow to an organ or tissue.
- Hibernating myocardium: A state in which heart muscle cells reduce their function and metabolism to survive under conditions of prolonged ischemia.
- Postconditioning: A strategy of intermittent interruptions of blood flow in the early phase of reperfusion to protect the myocardium from reperfusion injury.
See Also
External links
- Medical encyclopedia article on Myocardial stunning
- Wikipedia's article - Myocardial stunning
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