ABSTRACT
MDCT is increasingly used in paediatric patients. Because of its short acquisition time, CT can frequently be performed with mild sedation. Atrial septal defects are common congenital heart defects. The different types of defects ostium secundum defect, ostium primum defect, sinus venosus defect, coronary sinus defect, and patent foramen ovale are related to the embyronal development of the intraatrial septum. Anatomic assessment with CT can define the relationship of the defect to other anatomic structures, such as the coronary sinus or the sinus venosus. Ventricular septal defects are common in childhood, but either closed spontaneously or are closed surgically at an early age. The large branches of the coronary arteries are located in the epicardial fat.
