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hibernating myocardium

   Also found in: Dictionary/thesaurus, Encyclopedia, Wikipedia 0.01 sec.
myocardium /myo·car·di·um/ (-kahr´de-um) the middle and thickest layer of the heart wall, composed of cardiac muscle.
hibernating myocardium  see myocardial hibernation, under hibernation.
stunned myocardium  see myocardial stunning, under stunning.

hibernating myocardium
Cardiology Regional dysfunction of myocardial tissue due to prolonged local hypoperfusion, which is completely reversible upon restoration of adequate blood flow; hibernation occurs in Pts with CAD and impairment of left ventricular function at rest. Cf 'Stunned' myocardium, Thallium imaging.


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In conjunction with thallium imaging or dobutamine stress echocardiography, D-ribose supplementation has been used to enhance detection of hibernating myocardium.
Hibernating myocardium is the term used to refer to segments rendered dysfunctional secondary to chronic ischemia.
Nevertheless, since areas of hibernating myocardium exist side-by-side with normal heart muscle, the disparity in electrical activity can result in rhythmic chaos, making the heart vulnerable to fatal arrhythmias.
 
 
 
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