Arrhythmias & electrophysiology
Electrophysiologic mechanism and ablation strategy for macroreentrant biatrial tachycardias after Cox-maze procedures
Authors' conclusion
The optimal ablation strategy for BiATs after the maze procedure should be based on detailed demonstration of the circuit by high-density mapping.
Study context
- Population
- Patients undergoing catheter ablation of atrial tachycardia (AT) after Cox-maze procedures, with biatrial tachycardia (BiAT)
- Participants
- 76 patients12 BiATs
- Exposure
- Group 1 vs Group 2
- Group 1n = 7
- Group 2n = 5
- Outcome
- BiAT circuit mechanism and ablation target
Methodological detailsconsecutive patients, ultrahigh-density mapping, High-density activation mapping of left and right atrium with entrainment pacing to confirm circuit
- Consecutive patients
- Ultrahigh-density mapping
- High-density activation mapping of left and right atrium with entrainment pacing to confirm circuit
Main finding
As reported in the abstract
- Group 1: posterior interatrial connections involved in circuit; all ATs terminated by targeting corresponding left atrium end of posterior interatrial connections
- Group 2: maze lesions not blocked, most common gap at lesion end near annulus; ATs terminated by targeting gap near annulus
Observational data: associations, not effects.
Original publication
Electrophysiologic mechanism and ablation strategy for macroreentrant biatrial tachycardias after Cox-maze procedures. Heart Rhythm. Published 9 April 2024. doi:10.
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