<prompt> Most common congenital cardiac anomaly diagnosed in adulthood:ASDVSDPDATAPVR  <response>: Ans. a ASDRef: Harrison 19th ed. 1520ATRIAL SEPTAL DEFECT ASD In atrial septal defect there is congenital defect in the interatrial septum. It is Most common CHD diagnosed in adulthoodTYPES Based on Defects with Different Locations Function- ally the same Primum- lower part of the septum Secundum- located near the foramen ovale or fossa ovalis Sinus venosus- caval location Coronary sinus- least common - near SVC entryAlso Know Most common CHD diagnosed in infancy- VSD 2nd OVERALL MOST COMMON CONGENITAL CARDIAC ANOMALY- VSD In VSD all chambers are enlarged EXCEPT: Right Atrium MC cyanotic congenital heart disease: Tetralogy of Fallot TOF 2nd most common cyanotic CHD after TOF-TGA Most common cause of cyanosis in neonate: Transposition of Great arteries Most common cause of congenital heart disease beyond the neonatal period: Tetralogy of Fal-Radiological Features:1. All chambers are enlarged in ASD EXCEPT Left ventricle.2. Increased vascularity: Pulmonary artery over loading.3. Enlarged main dilated MPA and central pulmonary arteries 