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Unusual cause of dilated cardiomyopathy in an adolescent girl.

Dilated cardiomyopathy (DCM) is one of the cardiomyopathies where left ventricular (LV) or right ventricular systolic pump function of the heart is impaired with progressive cardiac enlargement and hypertrophy.1 About one-third of cases of congestive heart failure (CHF) is due to DCM.1 Takayasu’s arteritis (also known as ‘aortic arch syndrome’ and the ‘pulseless disease’) is a form of granulomatous vasculitis involving mainly the aorta and its branches,1 which causes extensive intimal fi brosis and narrowing of arteries. Females are 8–9 times more affected than males.1,2 Due to obstruction of the main branches of the aorta, Takayasu’s arteritis can present as pulseless upper extremities. Renal arteries are also involved. In India, Takayasu’s arteritis as cause of renovascular hypertension is reported in 28–75% cases.2 DCM per se, however, is reported in only 5–6% of cases of Takayasu’s arteritis.3