Arrhythmias & electrophysiologyResearch article
Effects of pacing sites on substrate mapping using decrement-evoked potential mapping for scar-related ventricular tachycardia
- study
Authors' conclusion
A high number of pacemap-matching DZs can be identified using 2-site pacing DEEP mapping.
Study context
- Population
- Patients with ischemic cardiomyopathy or nonischemic cardiomyopathy who underwent substrate mapping and ablation for scar-related ventricular tachycardia (VT)age 61.1 ± 17.7 years, 17 males · ischemic cardiomyopathy 11 · nonischemic cardiomyopathy 9
- Participants
- 20 patients
- Comparison
- Decrement-evoked potential (DEEP) maps obtained during right ventricular apical (RVA) and left ventricular outflow tract (LVOT) pacing
Main finding
As reported in the abstract
Number of pacemap-matching DZs
RVA S1
0.74
± 0.87
RVA S2
1.28
± 1.13
LVOT S1
1.00
± 0.91
LVOT S2
1.44
± 1.20
Further findings
Deceleration zones (DZs) visible only during one pacing site
- DZs visible only during RVA pacing (parallel to the conduction direction)
- 2
- DZs visible only during LVOT pacing
- 7
- of the LVOT-only DZs, parallel to the conduction direction
- 5
- of the LVOT-only DZs, located at the wavefront collision area
- 2
Patients in whom pacing was useful for finding more DZs
- S2 pacing
- 41.2%
- LVOT pacing
- 41.2%
VT recurrence · mean follow-up of 10.9 ± 3.6 months
- VT recurred in patients
- 30.0%
Original publication
Effects of pacing sites on substrate mapping using decrement-evoked potential mapping for scar-related ventricular tachycardia. Heart Rhythm. Published 19 April 2026. doi:10.1016/j.hrthm.2026.04.031
Summarised from the published abstract; every number is checked against it