Arrhythmias & electrophysiology
Activation patterns and electrophysiologic characteristics of Marshall bundle–related left atrial tachycardias after atrial fibrillation ablation
Authors' conclusion
Different types of MB-mediated LATs after AF ablation could be identified by ultrahigh-density mapping. Ethanol infusion within the VOM was effective in eliminating these tachycardias.
Study context
- Population
- Patients with MB-mediated left atrial tachycardias after atrial fibrillation (AF) ablation, 2019–2021
- Participants
- 28 patients
- Outcome
- Activation patterns of MB-mediated left atrial tachycardias (LATs) and corresponding electrophysiologic characteristics
Main finding
As reported in the abstract
Activation patterns with critical isthmus through the MB
Perimitral macroreentry (perimitral LAT)
n = 20
71.4%
Left atrial appendage-related reentry
n = 5
17.9%
Left pulmonary vein-related reentry
n = 3
10.7%
Further findings
Triple potential along previous endocardial left atrial ridge block line (near-field double potentials + far-field MB potential)
- Patients with characteristic triple potential
- 18
Findings delineated by vein of Marshall (VOM) cannulation or epicardial mapping
- Total patients
- 24
- Cannulation in the VOM
- 19
- Epicardial mapping
- 5
AT termination with ethanol infusion of the VOM
- AT terminated
- 20 of 28
Original publication
Activation patterns and electrophysiologic characteristics of Marshall bundle–related left atrial tachycardias after atrial fibrillation ablation. Heart Rhythm. Published 28 August 2024. doi:10.
Composed by AI from the published abstract and checked against it. How Briefs are made →