Arrhythmias & electrophysiology
Mapping and Ablation of Paraseptal Focal Atrial Tachycardias
Authors' conclusion
Paraseptal focal ATs arise from diverse but closely related anatomical locations. There is no single site from which ablation is consistently successful. Although some are indeed perinodal and accessible from the NCC, others arise from adjacent structures. Nevertheless, detailed, sequential mapping facilitates safe and effective ablation in most cases.
Study context
- Population
- Patients with paraseptal focal atrial tachycardia
- Participants
- 227 patients
- Outcome
- Anatomical distribution of foci
Methodological detailssingle-centre
- Single-centre
Main finding
As reported in the abstract
Observational data: associations, not effects.
Further findings
Ablation attempted
- Ablation attempted (of 227)
- 213 (93.8%)
Ablation success
- Successful ablation (of 213 attempted)
- 189 (88.7%)
P-wave morphology in V1
- V1 predominantly negative/positive, isoelectric/positive or isoelectric; did not distinguish sites
- 91%
Non-coronary cusp (NCC) as ablation site
- NCC not a common ablation site
Safety
- No persistent atrioventricular block
Original publication
Mapping and Ablation of Paraseptal Focal Atrial Tachycardias. JACC Clin Electrophysiol. Published 13 August 2025. doi:10.
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