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Catheter Ablation of Ventricular Tachycardia in Patients with Right Ventricular Dysplasia: Identification of Target Sites by Entrainment Mapping Techniques
Author(s) -
HARADA TOMOO,
AONUMA KAZUTAKA,
YAMAUCHI YASUTERU,
IGAWA MASAYUKI,
HACHIYA HITOSHI,
OH JUNGCHA,
TOMITA YASUSHI,
SUZUKI FUMIO,
NAKAGAWA TAKEMASA
Publication year - 1998
Publication title -
pacing and clinical electrophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.686
H-Index - 101
eISSN - 1540-8159
pISSN - 0147-8389
DOI - 10.1111/j.1540-8159.1998.tb01216.x
Subject(s) - medicine , catheter ablation , ventricular tachycardia , ablation , cardiology , arrhythmogenic right ventricular dysplasia , catheter , entrainment (biomusicology) , tachycardia , radiology , cardiomyopathy , heart failure , rhythm
Objective: To identify target sites for radiofrequency ablation of ventricular tachycardia (VT) by entrainment mapping techniques in patients with arrhythmogenic right ventricular dysplasia. Methods: Entrainment mapping and radiofrequency ablation of eight VTs was performed in seven patients. Radiofrequency ablation was applied at 31 reentry circuits sites that were classified based on findings during entrainment. Results: By entrainment criteria the 31 sites were classified as: exit sites (n = 12), proximal sites (n = 6), and outer loop sites (n = 13). Radiofrequency current application terminated VT at 7 of 31 sites: 2 of 12 exit sites (17%), 4 of 6 proximal sites (67%), and 1 of 13 outer loop sites (8%). Conclusion: Radiofrequency ablation terminated VTs most often at sites proximal to the exit as opposed to outer loop sites and exit sites (P = 0.05). The critical isthmus for ablation of VT in right ventricular dysplasia often may be distant to the exit.