Why the study?
It was unknown whether myocardial energetics could distinguish obesity cardiomyopathy as a distinct entity from dilated cardiomyopathy.
Does obesity modify the energetic phenotype of dilated cardiomyopathy, and does dietary weight loss improve myocardial contractility and metabolic efficiency in obese DCM patients?
Comparison
DCM with obesity vs normal weight DCM vs normal weight controls, plus dietary weight loss in obese DCM
Design
Comparative physiological study with a dietary intervention subgroup
Authors
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May support weight loss to improve LV function in obese cardiomyopathy; hypothesis-generating for distinct energetics, needing larger trials.
Does obesity modify the energetic phenotype of dilated cardiomyopathy, and does dietary weight loss improve myocardial contractility and metabolic efficiency in obese DCM patients?
Obesity cardiomyopathy exhibits a distinct energetic phenotype from normal-weight dilated cardiomyopathy, characterized by higher ATP demand through creatine kinase, which is partially reversible with dietary weight loss.
Rayner et al. (2021) studied this question.
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