title: Radiofrequency catheter ablation of atrial flutter after orthotopic heart transplantation: insights into the redefined critical isthmus.
abstract: We report a case of successful radiofrequency catheter ablation of recurrent atrial flutter in a heart transplant recipient and discuss technical aspects of the procedure. A counterclockwise flutter circuit was defined during endocardial mapping of the donor atrium. Termination of atrial flutter was achieved by creating lines of radiofrequency lesions from the tricuspid ring to the suture line between donor and recipient atria. Creation of bidirectional conduction block in the tricuspid ring-suture line isthmus resulted in abolition of atrial flutter.
authors.affiliation: Section of Cardiology, Rush-Presbyterian-St. Luke's Medical Center, Chicago, Illinois 60612, USA.
authors.forename: S L
authors.initials: SL
authors.lastname: Pinski
authors.forename: A J
authors.initials: AJ
authors.lastname: Bredikis
authors.forename: E
authors.initials: E
authors.lastname: Winkel
authors.forename: R G
authors.initials: RG
authors.lastname: Trohman
mesh_terms: D001282:Atrial Flutter / Q000473:pathology / Q000601:surgery*; D018780:Body Surface Potential Mapping; D017115:Catheter Ablation; D005500:Follow-Up Studies; D006325:Heart Atria / Q000473:pathology / Q000601:surgery; D006327:Heart Block / Q000601:surgery; D016027:Heart Transplantation / Q000473:pathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D012008:Recurrence; D014261:Tricuspid Valve / Q000473:pathology / Q000601:surgery