The heart does not decrease in size three months after dilated cardiomyopathy is cured. Dilated cardiomyopathy is a class of cardiomyopathies characterized by unexplained ventricular enlargement accompanied by cardiac systolic dysfunction, which is characterized by predominantly enlarged heart, and the heart will not shrink after dilated cardiomyopathy is treated. Dilated cardiomyopathy is characterized by enlargement of heart boundaries, ventricular dilatation, and thin ventricular walls; drug treatment can only prevent progressive cardiac dilatation, delay ventricular remodeling as well as further myocardial damage, and slow down the development of the disease, so the heart will not decrease in size after drug treatment. Cardiomyocytes are permanent cells, i.e., cells that do not have regenerative capacity, so if you suffer from cardiomyopathy, the easily damaged myocardial tissue will not be restored, and at the same time, the enlarged heart will not be reduced; the heart will not shrink on its own in dilated cardiomyopathy, and it will not be shrunk after drug treatment. If you have any symptoms of discomfort, you should go to the hospital and consult your physician for guidance.