Arrhythmias & electrophysiology
Directed Graph Mapping for Ventricular Tachycardia: A Comparison to Established Mapping Techniques
Authors' conclusion
DGM is a rapid automated algorithm that has a strong level of agreement with TM for manually re-annotated VT maps.
Study context
- Population
- Patients with structural heart disease undergoing ventricular tachycardia (VT) ablation with entrainment-proven critical isthmus and high-density electroanatomical activation map7 focal, 28 re-entrant
- Participants
- 35 patients
- Comparison
- Directed graph mapping (DGM) and automated conduction velocity mapping (ACVM) vs traditional mapping
- Outcome
- Ability to identify VT mechanism, characterize VT circuit and locate critical isthmus
Methodological detailsretrospective case series
- Retrospective case series
Performance
As reported in the abstract
Agreement with TM for VT mechanism and circuit type; isthmus identification
| Test or model | Kappa vs traditional mapping (TM) | Putative isthmus identified (re-entrant) | Focal activation correctly identified |
|---|---|---|---|
| DGM | 0.79; P < 0.01 | 25 (89%) | all cases |
| ACVM | 0.66; P < 0.01 | 25 (89%) | all cases |
Kappa vs traditional mapping (TM)
DGM0.79; P < 0.01
ACVM0.66; P < 0.01
Putative isthmus identified (re-entrant)
DGM25 (89%)
ACVM25 (89%)
Focal activation correctly identified
DGMall cases
ACVMall cases
Original publication
Directed Graph Mapping for Ventricular Tachycardia: A Comparison to Established Mapping Techniques. JACC Clin Electrophysiol. Published 26 October 2022. doi:10.
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