Arrhythmias & electrophysiologyCohort study
Electrophysiological characteristics and ablation of ventricular arrhythmias originating from the intramural basal inferior septum
- Retrospective cohort study
- consecutive patients
Authors' conclusion
Intramural VAs were relatively common in the BIS region in our series. Intra-procedural mapping was important to distinguish the intramural VAs from other VAs by comparing the local activation time and pacing mapping. Procedural success could be achieved by stepwise ablation on the counterpart sides of the BIS and within the MCV.
Study context
- Population
- Patients undergoing catheter ablation of ventricular arrhythmia (VAs) from the basal inferior septum (BIS)
- Participants
- 55 patients
- Exposure
- Intramural vs LV-BIS vs RV-BIS origin of VA
- LV-BISn = 28
- RV-BISn = 8
- Intran = 19
Main finding
As reported in the abstract
Intra: earliest activation time, right BIS (mean ± SD)
7.79 ± 2.38 ms
Intra: earliest activation time, left BIS (mean ± SD)
7.16 ± 2.59 ms
Intra: earliest activation time, middle cardiac vein (MCV) (mean ± SD)
6.26 ± 1.73 ms
Right vs left vs MCV
P = 0.173
Observational data: associations, not effects.
Further findings
- Recurrent VA after follow-up (Intra)
- 3 · events
Recurrent VA after follow-up (Intra)
- All treated well by redo procedure or drug therapy
Original publication
Summarised from the published abstract; every number is checked against it