Identification of cavotricuspid isthmus conduction block, pitfall of differential pacing maneuver

Abstract Funding Acknowledgements Type of funding sources: None. Introduction Differential pacing (DP) maneuver was generally used to assess bidirectional block cavotricuspid isthmus (CTI) after catheter ablation. Purpose The purpose the study is identify limitation DP and suggest continuous sequence (CS) as a complement differential pacing. Methods Patients who were diagnosed typical atrial flutter underwent ablation enrolled. CTI conduction evaluated by two maneuver, CS maneuver. We tried for each patient with both maneuvers. With assessed recorded diagnostic catheter. Results Sixty patients investigated. Two maneuvers performed in all patients. There 8 cases (8/62, 12.9%) discrepancy between result One cases, identified but insufficient rest (11.2%) opposite. Conclusion could not guarantee because anatomical complexity instability. found incomplete over 10% conventional simple can be overcome