Transthoracic Echocardiography Findings in an Adolescent With Late-Detection Subaortic Membrane and Patent Ductus Arteriosus: Impact of Surgical Intervention.

• Left ventricular dilation may return toward normal after surgical correction of a large PDA. • PH may normalize after surgical correction of a large PDA. • PDA should be included in the differential diagnosis of cardiomyopathy in an adolescent.