Cavotricuspid isthmus: anatomy, electrophysiology, and long-term outcome of radiofrequency ablation.
The cavotricuspid isthmus (CTI) had a complex architecture with an anisotropic conduction property. An incremental pacing from the low right atrial isthmus produced a conduction delay and block, and initiated atrial flutter. Radiofrequency catheter ablation of the CTI was very effective in eliminating the typical atrial flutter. However, atrial fibrillation often occurred after ablation of the isthmus and needs further treatment.
Tai
Ching-Tai
CT
Department of Medicine, Division of Cardiology, National Yang-Ming University School of Medicine, Taipei Veterans General Hospital, Taiwan, R.O.C. ct.tai@msa.hinet.net
Chen
Shin-Ann
SA
D001281:Atrial Fibrillation; D001282:Atrial Flutter / Q000503:physiopathology* / Q000601:surgery*; D017115:Catheter Ablation / Q000379:methods; D004594:Electrophysiology; D006325:Heart Atria / Q000000981:diagnostic imaging / Q000473:pathology* / Q000503:physiopathology* / Q000601:surgery; D006801:Humans; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome