Arrhythmias & electrophysiologyResearch article
Effects of Pulsed Field Ablation for Pulmonary Vein Isolation on Vein of Marshall Electrograms
- Not stated
- continuous vein of Marshall (VoM) electrogram recording with a 1.6-F electrode catheter
Authors' conclusion
The impact of PFA on VoM electrograms varied among PFA systems and was largely determined by the PFA electrode-VoM distance. Notably, the majority of VoM electrogram alterations were transient.
Study context
- Population
- Patients undergoing pulsed field ablation (PFA)-based PV isolationpatients undergoing PFA-based PV isolation · FARAPULSE 28 · VARIPULSE 21 · PulseSelect 23
- Participants
- 72 patients
- Comparison
- FARAPULSE vs VARIPULSE vs PulseSelect
- FARAPULSEn = 28
- VARIPULSEn = 21
- PulseSelectn = 23
Main finding
As reported in the abstract
VoM electrograms eliminated
16 patients (22%)
VoM electrograms reduced
16 patients (22%)
Further findings
PFA electrode-VoM distance by electrogram effect (median [Q1-Q3])
- PFA electrode-VoM distance by electrogram effect (median [Q1-Q3]): P < 0.001
Extent of VoM electrogram alteration by PFA system
- Differed among PFA systems and was greatest with FARAPULSE
- P < 0.001
Recovery among patients with acute VoM electrogram elimination · by the end of the procedure
- Persistent elimination, among patients with acute VoM electrogram elimination
- 9 patients (56%)
- Partial recovery, among patients with acute VoM electrogram elimination
- 1 patient (6%)
- Complete restoration, among patients with acute VoM electrogram elimination
- 6 patients (38%)
Recovery among patients with acute VoM electrogram reduction
- All patients with acute VoM electrogram reduction showed complete recovery
Persistent VoM electrogram modification
- Overall, of patients undergoing PFA-based PV isolation
- 14%
Original publication
Summarised from the published abstract; every number is checked against it