Atrial Septal Defect (Sinus Venosus Type) with a Partial Anomalous Pulmonary Venous Return (Two Right Pulmonary Veins)
A 23-year-old man presented with recently developed dyspnea on exertion (functional class II–III). Transthoracic echocardiography showed severe right atrial and ventricular dilation.
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