cardiomegaly is enlarged heart and it may occur due to following causes cardiomyopathy heart valve disease congestive heart failure pulmonary hypertension hypertension cardiomegaly leads to ineffective pumping of blood by heart and may result into cardiac failure if appropriate treatment is delayed. your cardiac surgeon will do following test to find out the cause- examine heart sound by stethoscope to detect any murmur. ECG advise a chest x -ray advise a echocardiography after following test are done and the cause is diagnosed he will choose the medicines to continue the treatment because the choice of medicine varies according to the cause of cardiomegaly . thankyou and take care.