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Aorto‐pulmonary window (APW) is a rare congenital heart defect characterized by the connection between the ascending aorta and the pulmonary trunk before its bifurcation, just above the semilunar valves, due to the abnormal development of spiral septum. The short‐axis echocardiographic view of the right ventricular outflow track, the three‐vessel‐view, and the three‐vessel‐trachea view are the key...