Fig. 1

A 19-year-old female with a single left coronary artery associated with Fallot tetralogy: CTA images in a axial plane shows thickened pulmonary valve (PV) with prepulmonic course of RCA and dilated ascending aorta (AO) b Sagittal plane shows pulmonary stenosis (*) at the level of right ventricular outflow tract (RVOT) and right ventricular hypertrophy (RVH). c Axial plane shows thickened and deformed aortic valve (AV) and dilated right atrium (RA). d Coronal plane shows subaortic VSD (→) and overriding of aorta. CTA Volume rendered (e, g, h) and Maximum Intensity Projection (f) images showing a coronary arterial tree with L-II A type of SCA anomaly arising from left Aortic (AO) sinus. Soon after its origin, arterial trunk was giving origin to a large left circumflex artery (LCX) and then continued to run in the anterior inter ventricular sulcus and divided into right coronary artery (RCA) and Left anterior descending artery (LAD). RCA was coursing anterior to RVOT (pre-pulmonic course). PT—pulmonary trunk