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An 8-month-old child presented with recurrent episodes of cyanosis and feed intolerance, progressively increasing for the past 4 months. Blood oxygen saturation was 73%. Echocardiography revealed a hypoplastic left heart, double outlet right ventricle (DORV) and pulmonary arterial hypertension (PAH). A CT angiography was planned to better delineate the anatomy. ECG-gated cardiac CT done on a 384 slice third generation dual-source CT scanner, revealed mitral atresia (Figure 1 (A)), a hypoplastic left ventricle (Figure 1 (A, C)), DORV (Figure 1 (B, C)), a large ventricular septal defect (VSD)(white asterisk in Figure 1 (A)) and infundibular pulmonic stenosis (PS)(Figures 1 (B) and 2 (B)). In addition, there was a restrictive atrial septal defect (Figure 2 (C)) with dilated left atrium (LA) and presence of left atrial diverticulum (white asterisk in Figure 2 (A)), resulting from increased LA pressures. There was a mild …