Arrhythmias & electrophysiology
Importance of Right Ventricular Mapping and Ablation for Ventricular Tachycardia in Postinfarction Patients
Authors' conclusion
The arrhythmogenic substrate in PMI patients often involves the right ventricle, including the septum and free wall. The presence of RV dysfunction and greater LVEF were associated with the presence of RV free wall target sites. Patients with only RV septal target sites had worse postablation outcomes.
Study context
- Population
- Patients undergoing ablation for post-MI ventricular tachycardia (VT) with right ventricular (RV) target sitesof 277 PMI VT ablations
- Participants
- 30 patients
- Exposure
- RV free wall vs septal VT target sites
- Free walln = 10
- Septaln = 20reference
- Outcome
- Characteristics by RV target site
Methodological detailsconsecutive patients
- Consecutive patients
Main finding
As reported in the abstract
RV dysfunction
P = 0.023
| Outcome | Free wall | Septal | P value |
|---|---|---|---|
| LVEF | 38.3% ± 21.06% | 23.9% ± 11.93% | P = 0.02 |
- RV target sites among PMI VT ablations
- 30 (11%)
- VTs with RV targets induced
- 57
Observational data: associations, not effects.
Further findings
| Outcome | P value |
|---|---|
| Survival free of VT, transplantation or LV assist device after ablation · mean follow-up 3.4 ± 3.2 yearsWorse with septal target sites | log-rank P < 0.05 |
Original publication
Importance of Right Ventricular Mapping and Ablation for Ventricular Tachycardia in Postinfarction Patients. JACC Clin Electrophysiol. Published 26 October 2022. doi:10.
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