Arrhythmias & electrophysiology
Accuracy of non-invasive electrocardiographic imaging in scar-dependent ventricular tachycardia: relationship to arrhythmogenic substrate and imaging defined scar
An erratum to this article was published (Europace, 2 Jun 2026 ↗)
Authors' conclusion
ECGi mapping with VIVO can accurately predict the arrhythmogenic substrate for scar-dependent VT.
Study context
- Population
- Patients with scar-dependent ventricular tachycardia (VT)
- Participants
- 31 patients · 48 VTs
- Comparison
- Electrocardiographic imaging (ECGi) vs electro-anatomical mapping
- Outcome
- Accuracy of ECGi in localizing the arrhythmogenic substrate (VT exit site region concordance with EAM by AHA segment)
Methodological detailsblinded analysis
- Blinded analysis
Performance
As reported in the abstract
VT-ESR match, ECGi vs EAM
Complete match (exact AHA segment concordance)
67%
Partial match (adjacent segments)
21%
Further findings
| Outcome | ECGi | EAM | |
|---|---|---|---|
| Epicardial VT-ESR identification | |||
| Sensitivity, ischaemic cardiomyopathy | 71.4% | Not reported in the abstract | EAM: not reported in the abstract |
| Specificity, ischaemic cardiomyopathy | 92.9% | Not reported in the abstract | EAM: not reported in the abstract |
| Sensitivity, non-ischaemic cardiomyopathy | 66.7% | Not reported in the abstract | EAM: not reported in the abstract |
| Specificity, non-ischaemic cardiomyopathy | 100% | Not reported in the abstract | EAM: not reported in the abstract |
ECGi VT-exit site region (VT-ESR) relationship to scar, isthmus and successful ablation sites
- ECGi VT-ESR within or adjacent to imaging-defined scar
- 85%
- VT isthmus within or adjacent to ECGi VT-ESR
- 77%
- Successful ablation sites within or adjacent to ECGi VT-ESR
- 82%
- Accuracy not affected by cardiomyopathy type or VT cycle length
Original publication
Accuracy of non-invasive electrocardiographic imaging in scar-dependent ventricular tachycardia: relationship to arrhythmogenic substrate and imaging defined scar. Europace. Published 9 April 2026. doi:10.
Summarised from the published abstract; every number is checked against it