Arrhythmias & electrophysiology
Utility of Very High-Output Pacing to Identify Ventricular Tachycardia (VT) Circuits in Patients Manifesting Traditionally Inexcitable Scar
Authors' conclusion
In VT patients with a dense scar that is traditionally inexcitable, V-HOP can identify CCs of the re-entrant circuit and guide successful ablation.
Study context
- Population
- Patients undergoing VT ablation with dense myocardial scar requiring very high-output pacing (V-HOP) to capture sites of interest26 VT ablations
- Participants
- 25 patients
- Outcome
- Identification of critical components (CCs) of VT circuits with V-HOP
Main finding
As reported in the abstract
- VT successfully entrained with V-HOP (patients)
- 17
- Central isthmus sites identified (patients)
- 10
- Entrance/exit sites identified (patients)
- 4
- VT terminated with RF ablation at these sites (patients)
- 15
- Scar locations with delayed exit identified (patients)
- 9
- Acute procedural success (patients)
- 24
Observational data: associations, not effects.
Further findings
| Outcome | Values |
|---|---|
| VT recurrence requiring repeat ablation · follow-up 16 ± 21 months | V-HOP 2 events |
- VT recurrence requiring repeat ablation — Same location targeted successfully at repeat ablation (patients)
- 1
Safety
- No adverse events
Original publication
Utility of Very High-Output Pacing to Identify VT Circuits in Patients Manifesting Traditionally Inexcitable Scar. JACC Clin Electrophysiol. Published 13 September 2023. doi:10.
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