Delayed presentation of aorto-pulmonary window, double outlet right ventricle with pulmonary arterial hypertension: Illustration of uncommon association on dual-energy CT.

We present a case of a 26-year-old female with double outlet right ventricle and proximal aorto-pulmonary window (APW). The case highlights the role of computed tomography angiography in the diagnosis and characterization of APW defects, which are difficult to be diagnosed on transthoracic echocardiography.