Arrhythmias & electrophysiologyResearch article
Effects of Dual-Energy Lattice-Tip Catheter Ablation of Ventricular Arrhythmias on Cardiac Implantable Electronic Device Performance
- consecutive patients reviewed
Authors' conclusion
Ventricular arrhythmia ablation using the Sphere-9 dual-energy lattice-tip catheter was associated with small but persistent changes in right and left ventricular lead parameters. Serious CIED interactions were uncommon, and further studies are needed to better understand the underlying mechanisms.
Study context
- Population
- Patients with pre-existing cardiac implantable electronic devices (CIEDs) who underwent ventricular arrhythmia (VA) ablation using the Sphere-9 catheterventricular tachycardia 62 · premature ventricular contraction 3
- Participants
- 65 consecutive patients
- Comparison
- CIED function preprocedure vs postprocedure and 3-month follow-up
- combined radiofrequency ablation (RFA)/pulsed field ablation (PFA)n = 53
- RFA alonen = 6
- PFA alonen = 6
Main finding
As reported in the abstract
reduced sensing amplitude
11.7-10.0 mV, P = 0.04
reduced pacing impedance
441-422 Ω, P < 0.001
reduced shock impedance
64-59 Ω, P = 0.01
increased capture threshold
0.9-1.0 V at 0.4-0.5 milliseconds, P = 0.03
Further findings
Left ventricular (LV) lead parameters · 3-months
- reduced pacing impedance
- 544-475 Ω, P = 0.04
- LV capture threshold remained elevated
- 1.0-1.4 V, P = 0.08
Right atrial lead parameters · 3-months
- Right atrial lead parameters remained stable
Safety
CIED revision and pulse generator failure
- cardiac resynchronization therapy-D pulse generator failure during PFA delivery 7.5 mm from an LV lead tip electrode, requiring generator replacement
- One patient
- No patient required CIED revision
Original publication
Summarised from the published abstract; every number is checked against it