Conflicto de intereses: los autores declaran no tener conflicto comercial, financiero, personal u otras relaciones con otras personas u organizaciones que podrían influir inadecuadamente en este trabajo.Reversible Dilated Cardiomyopathy in hypothyroidism: Case report.Dilated cardiomyopathy is usually not reversible. In a few cases diverse etiologies can be treated and cardiomyopathy may disappear or improve significantly. The case of a young man with hypothyroidism and dilated cardiomyopathy is presented. After thyroid hormone replacement, a severe left ventricular dysfunction became reverted.