Arrhythmias & electrophysiologyCohort study
Comparison of first deflection annotation algorithm and near-field annotation algorithm in premature ventricular complex ablation
- Retrospective analysis
Authors' conclusion
FD detection provides earlier LAT activation, while NF detection captures higher-frequency signals. Closer spatial correlation between FD and NF may predict more efficient ablation, even though mapping parameters did not differ significantly across categorized groups.
Study context
- Population
- Patients who underwent first-time PVC ablation, remapped using Turbomap on the Ensite X system
- Participants
- 59 patients · 71 ablation sites
- Exposure
- first deflection (FD) and near-field (NF) detection using the Turbomap modality on the Ensite X system
Main finding
As reported in the abstract
FD
−37.8
mean · SD 14.7 · msec
NF
−27.9
mean · SD 12.4 · msec
P < 0.001
Observational data: associations, not effects.
Further findings
Peak frequency · higher peak frequency with NF
P = 0.044
Area of the earliest activation within 5 msec
- No significant differences between techniques
Mapping parameters by PVC origin (right ventricular outflow tract vs left ventricular summit) and by ablation strategy (single-chamber vs multi-chamber ablation)
- No significant differences in mapping parameters
Distance between FD- and NF-annotated earliest activation sites, by successful PVC elimination within 2 ablation attempts
- Successful PVC elimination within 2 ablation attempts
- 3.1 ± 2.7 mm
- Comparator
- 8.3 ± 5.0 mm
- P
- P < 0.001
- shorter distance significantly associated with successful PVC elimination within 2 ablation attempts
Original publication
Summarised from the published abstract; every number is checked against it