Arrhythmias & electrophysiology
Differential Pacing Maneuver From the Vein of Marshall
Authors' conclusion
Differential VOM pacing maneuver reflects the VOM conduction status. This maneuver can uncover residual epicardial connections that are missing with CS pacing.
Study context
- Population
- Patients undergoing radiofrequency and vein of Marshall (VOM) ethanol mitral isthmus ablation with a VOM electrode catheter
- Participants
- 50 patients
- Comparison
- Differential VOM pacing vs conventional coronary sinus (CS) pacing for verification of mitral isthmus block
- Residual VOM connectionn = 11
- VOM blockn = 30reference
- Outcome
- Differential VOM pacing in patients with complete MI block by CS pacing
Performance
As reported in the abstract
| Test or model | Value | Distal minus proximal VOM pacing interval (longer) | Distal vs proximal VOM pacing interval (shorter) |
|---|---|---|---|
| VOM block | 73% | 11±5 ms | |
| Residual VOM connection | 27% | 16±8 ms |
Value
VOM block73%
Residual VOM connection27%
Distal minus proximal VOM pacing interval (longer)
VOM block11±5 ms
Residual VOM connection— not stated in the abstract
Distal vs proximal VOM pacing interval (shorter)
VOM block— not stated in the abstract
Residual VOM connection16±8 ms
- Incomplete mitral isthmus (MI) ablation by CS pacing; analysis indicated persistent VOM connection
- 9 patients
Further findings
Conduction time across the line, in patients with complete MI block by CS pacing
P < 0.01
- Conduction time across the line, in patients with complete MI block by CS pacing: significantly shorter in the 11 patients with residual VOM connection
Reevaluation after VOM ethanol and further radiofrequency ablation of the connection
- Successful reevaluated analyses indicating VOM block achievement
- 10
Original publication
Differential Pacing Maneuver From the Vein of Marshall. Circ Arrhythm Electrophysiol. Published 23 February 2024. doi:10.
Composed by AI from the published abstract and checked against it. How Briefs are made →