A 39-year-old asymptomatic woman was referred for further evaluation of a systolic murmur (grade 2/6) over the pulmonary area. Physical examination was otherwise unremarkable. Resting electrocardiography was normal as well. Transthoracic echocardiography revealed cardiac dextroposition, dilated right atrium and ventricle. However, no significant valvular lesions were detected, and both the inter-atrial and inter-ventricular septa appeared intact. …