Aortic atresia with aortopulmonary window simulating common arterial trunk.

We describe the findings in a neonate with aortic atresia, interruption of the aortic arch between the carotid arteries, and aortopulmonary window. This unusual association changes the anticipated physiology, and helps in the survival. We emphasize the fact that this combination simulates common arterial trunk, both clinically and on echocardiography.