Juxtaposed Atrial Appendage in Congenital Heart Diseases: Evaluation by multi-slice CT a retrospective study.

Background: A rare congenital cardiac anomaly is a juxtaposition of atrial appendages; JAA is a marker for cyanotic CHDs. The study aims to describe and detect the incidence of JAA in congenital heart disease and if there is an association between its presence and the complexity of CHDs.Patients and Methods: a retrospective, cross-sectional, single-center analysis of all patients diagnosed with congenital heart disease who underwent MSCT examination in Aswan Heart Center from 2012 to March 2021.Results: The majority of patients diagnosed as transposition of great arteries (TGA); were 24 patients, followed by 21 patients diagnosed as double outlet right ventricle (DORV), 9 patients diagnosed as tricuspid atresia (TA), 9 patients diagnosed as tetralogy of Fallot (TOF), 5 patients of JAA associated with DIL, finally 5 patients of JAA associated with simple CHD.Conclusion: JAA was diagnosed in 3.5 % of patients referred for MSCT; Left-JAA is more frequent than right-JAA The lesion-specific incidences and associated lesions were similar to previous studies. The presence of JAA on MSCT angiography shows that several cyanotic CHDs are present.