Arrhythmias & electrophysiologyCohort study
Evaluation of posterior mitral isthmus ablation in the absence of a vein of Marshall
- Matched cohort study
- matched control group
Authors' conclusion
The absence of a VoM is associated with a very high rate of procedural block during posterior MI ablation.
Study context
- Population
- Patients undergoing posterior mitral isthmus radiofrequency (RF) ablation without an angiographic vein of Marshall
- Exposure
- Posterior mitral isthmus ablation without Vein of Marshall (VoM) vs matched controls
- No VoMn = 37
- Outcome
- Procedural mitral isthmus block
Main finding
As reported in the abstract
Mitral isthmus block
P < 0.01
Observational data: associations, not effects.
Further findings
RF tags
P = 0.8
RF time
P = 0.08
- Ablation approach for block (No VoM)
- 5/37 (14%) · Endocardial ablation only · Combined endocardial and coronary sinus ablation 32/37 (86%)
Original publication
Evaluation of posterior mitral isthmus ablation in the absence of a vein of Marshall. Europace. Published 1 October 2024. doi:10.1093/europace/euae255
Summarised from the published abstract; every number is checked against it