Arrhythmias & electrophysiology
Omnipolar versus bipolar mapping to guide ventricular tachycardia ablation
Authors' conclusion
OT is a valuable tool for guiding VT ablation, providing more accurate identification of LPs and isochronal crowding due to slightly higher voltages.
Study context
- Population
- Patients undergoing ventricular tachycardia (VT) ablation under omnipolar technology (OT) guidance (16 [66%] ischemic cardiomyopathy, 12 [50%] redo cases)27 substrate + 10 VT maps
- Participants
- 24 patients
- Exposure
- Omnipolar vs bipolar high-density mapping
- Outcome
- Voltage amplitude, late potential (LP) annotation and isochronal late activation mapping distribution
Methodological detailswithin-patient comparison of mapping techniques, blinded operators
- Within-patient comparison of mapping techniques
- Blinded operators
Main finding
As reported in the abstract
Omnipolar vs bipolar high-density maps: voltage, LP annotation, isochronal late activation mapping
| Group | Sensitivity, VT isthmus detection in deceleration zones | Specificity, VT isthmus detection in deceleration zones |
|---|---|---|
| OT | 75% | 65% |
| Bipolar | 35% | 55% |
Sensitivity, VT isthmus detection in deceleration zones
OT75%
Bipolar35%
Specificity, VT isthmus detection in deceleration zones
OT65%
Bipolar55%
- OT vs Bipolar: P = 0.01 — 6.8% vs 21.9%; sensitivity 53% vs 59%, specificity 79% vs 63%
- OT vs Bipolar: 13.8 vs 8.0 points/cm² — 13.8 vs 8.0 points/cm²
- Omnipolar points had higher voltages than bipolar points within dense scar and border zone
- 7.1%
Observational data: associations, not effects.
Further findings
Freedom from VT recurrence · 8.4 months
- Freedom from VT recurrence
- 71%
Original publication
Omnipolar versus bipolar mapping to guide ventricular tachycardia ablation. Heart Rhythm. Published 5 July 2023. doi:10.
Composed by AI from the published abstract and checked against it. How Briefs are made →