Arrhythmias & electrophysiology
The Misleading QRS Morphology of Scar-Related Ventricular Tachycardia
Authors' conclusion
For scar-related VTs, the exit predicted from a vector-based QRS algorithm often differs from the location where ablation terminates the VT.
Study context
- Population
- Scar-related re-entrant LV ventricular tachycardia (VTs) (57.9% ischemic cardiomyopathy) with an identified region where radiofrequency ablation (RFA) terminated the VT
- Participants
- 64 VTs
- Outcome
- Relation of the RFA termination site to the exit region predicted by a vector-based QRS algorithm (AHA 17-segment LV model)
Main finding
As reported in the abstract
QRS morphology discordant with termination region
Discordant VTs
57
89%
Termination region remote from circuit exit
22
34.4%
Termination site in circuit exit, but QRS suggested a different exit region
32
50%
Observational data: associations, not effects.
Further findings
Voltage maps and pace mapping
- QRS vector often altered by scar
Original publication
The Misleading QRS Morphology of Scar-Related Ventricular Tachycardia. JACC Clin Electrophysiol. Published 28 August 2025. doi:10.
Composed by AI from the published abstract and checked against it. How Briefs are made →