Why the study?
Does superimposed chronic afterload alter ventricular function and contractile proteins in the infarcted rat heart?
Population
Female Wistar rats obtained at 10 weeks of age (200-225 g)
Comparison
Coronary artery ligation to produce infarction… vs Infarction alone and sham-operated animals
Design
Preclinical
Follow-up
8 weeks after initial surgical intervention
Authors
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Superimposed afterload may impair contractile proteins post-MI without affecting function in rats; leaves open clinical translation.
Does superimposed chronic afterload alter ventricular function and contractile proteins in the infarcted rat heart?
In a rat model of myocardial infarction, surviving myocardium exposed to chronic afterload fails to increase cardiac mass and shows depressed contractile protein function, despite maintained in situ cardiac function.
Geenen et al. (1991) studied this question.
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