Arrhythmias & electrophysiologyResearch article
Vector estimation, resampling, and smoothing algorithm (VERSA): Omnipolar vector mapping from arbitrarily positioned electrodes
- Omnipolar vector mapping from electroanatomic mapping data
Authors' conclusion
Extending omnipolar technology to arbitrary electrode arrangements and visualizing measurements in VERSA maps can elucidate wavefront propagation in reentrant tachycardias without the need for LAT annotation. These methods could facilitate better interpretation of complex arrhythmia patterns and more effective ablation.
Study context
- Population
- Scar-related reentrant atrial tachycardias and ventricular tachycardia mapped with PENTARAY and OCTARAY catheters34 scar-related reentrant atrial tachycardias and 1 ventricular tachycardia · scar-related reentrant atrial tachycardias 34 · ventricular tachycardia 1
- Comparison
- Omnipolar estimates of conduction velocity (CV), activation direction (AD) and voltage compared with conventional analogs (local activation time (LAT)-derived equivalents)
Main finding
As reported in the abstract
Conduction velocity (CV)
- omnipolar CV was higher than LAT-based CV
Further findings
Activation direction (AD)
- differences in AD were negligible
Voltage
- Omnipolar voltages were significantly higher than the corresponding maximum bipolar voltages
VERSA maps (qualitative assessment)
- VERSA maps intuitively depicted wavefront propagation, agreed broadly with activation maps, and illustrated conduction block, conduction breakthrough, and overall patterns of reentry
Original publication
VERSA: Omnipolar vector mapping from arbitrarily positioned electrodes. Heart Rhythm. Published 29 January 2026. doi:10.1016/j.hrthm.2026.01.032
Summarised from the published abstract; every number is checked against it