Premium
Overdrive pacing mapping: An alternative approach used in scar associated localized atrial tachycardia
Author(s) -
Jiang Jingzhou,
Yang Yang,
Liu Chen,
Ma Yuedong,
Wang Lichun,
He Jiangui,
Tang Anli,
Hess Paul H.,
Kerlan Jeffrey E.,
Feng Chong,
Lan David Z.
Publication year - 2019
Publication title -
journal of cardiovascular electrophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.193
H-Index - 138
eISSN - 1540-8167
pISSN - 1045-3873
DOI - 10.1111/jce.14200
Subject(s) - medicine , ablation , reentry , atrial fibrillation , cardiology , atrial tachycardia , radiofrequency ablation , tachycardia , mitral annulus , catheter ablation , blood pressure , diastole
Background Mapping and ablation of localized reentry atrial tachycardia (AT) can be challenging, especially in those with varying cycle length (CL). Objective We attempted to use the traditional maneuver of overdrive pacing to facilitate AT mapping. Methods Data were collected from 12 patients with localized ATs. All patients had prior cardiac surgery or prior atrial fibrillation ablation. Overdrive pacing mapping (ODPM) was performed to find independent local activity (ILA) and compared with conventional activation mapping (CAM) during ongoing AT to determine its accuracy and efficacy. Patients with macro‐reentry AT around the tricuspid or mitral annulus were excluded. Results Twelve patients with 14 localized ATs were included. All 14 ATs including 4 (29%) with varying CL successfully completed ODPM and had the ILA, although two ATs terminated during ODP and required repeated mapping. Radiofrequency ablation focused on critical sites with ILA was successful in all 12 patients. Using CAM, however, 6 of 14 ATs (43%) mapping attempts were aborted due to AT termination (2 ATs) or varying CL (4 ATs), and only 5 of 8 (63%) located “critical sites” were ultimately confirmed by entrainment and ablation results. After 25 ± 9 months of follow‐up, no patient had AT recurrence. Conclusion Our preliminary results demonstrated that ODPM is superior to CAM in ATs that were poorly sustained or with varying CL and is a useful supplement to CAM.