In a canine model, Kim et al (8) reported that infarcts exhibited hyperenhancement whether acute or chronic, whereas stunned or hibernating myocardium did not.
Comparison of 201Tl, 99mTc-tetrofosmin, and dobutamine magnetic resonance imaging for identifying hibernating myocardium.
Therefore, a combination of techniques to evaluate several of these parameters is generally used clinically in considering if repetitively stunned or hibernating myocardium exists as a cause of reversible left ventricular dysfunction, warranting coronary revascularization.
Tracer uptake should increase in the distribution of hibernating myocardium supplied by a patent coronary artery.
However, it is now known that functional recovery may not occur until as long as 6 months after revascularization in patients with hibernating myocardium (in contradistinction to those with only stunning).
For the differentiation of scarred versus hibernating myocardium, the patient groups studied in most reported series include those with chronic coronary artery disease.