biostudies-literatureUnknown11Angoff RKWe report a case of a 70-year-old woman who presented for a cavotricuspid isthmus atrial flutter ablation that was aborted prematurely. On subsequent imaging, she was discovered to have a right atrial diverticulum, which was present on prior imaging but not reported, likely due to unfamiliarity with the entity. (<b>Level of Difficulty: Intermediate.</b>).JACC. Case reports101788https://www.ebi.ac.uk/biostudies/studies/S-EPMC10107035biostudies-literatureA Focus on the Right Atrium: Right Atrial Diverticulum and Atrial Flutter.PMC10107035Gavin MCStrom JBWaks JWStabenau HFAngoff RKfalseA Focus on the Right Atrium: Right Atrial Diverticulum and Atrial Flutter.We report a case of a 70-year-old woman who presented for a cavotricuspid isthmus atrial flutter ablation that was aborted prematurely. On subsequent imaging, she was discovered to have a right atrial diverticulum, which was present on prior imaging but not reported, likely due to unfamiliarity with the entity. (<b>Level of Difficulty: Intermediate.</b>).2023-01-01T00:00:00Z2023 Apr2025-04-18T14:52:03.508Z2025-04-07T01:10:02.183ZS-EPMC101070353707744810.1016/j.jaccas.2023.101788