Key result
In a porcine model of hibernating myocardium, epinephrine infusion increased peak segment shortening and oxygen consumption without lactate production, demonstrating retained metabolic reserve.
p-value: p=<0.05
Hibernating myocardium retains the ability to increase metabolism and function during stress without developing acute ischemia, suggesting that resting downregulation is an adaptive response.
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Retained metabolic reserve in hibernating myocardium supports adaptive downregulation; leaves open translation to human stress testing and management.
Fallavollita et al. (2003) studied Hibernating myocardium (n=8). Graded intravenous epinephrine infusion and atrial pacing vs. Resting state was evaluated on Myocardial function and metabolism (segment shortening, oxygen consumption, lactate uptake) during stress (p=<0.05). In a porcine model of hibernating myocardium, epinephrine infusion increased peak segment shortening and oxygen consumption without lactate production, demonstrating retained metabolic reserve.
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