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[–] ChineseCaptcha 0 points 6 points (+6|-0) ago 

Of course they had to do a study for that. Science regularly investigates whether things we assume are true actually hold. However, in this case the question was whether following bariatric surgery allows the heart to return to its natural shape and function. It would seem perfectly plausible that such a change was not reversible and in fact we don't yet know if that reversal is possible when the period of obesity exceeded more than a decade.