Abstract
Background: Catheter ablation is effective in the treatment of arrhythmias. The effect of ablation on Cardiovascular Implantable Electronic Devices (CIED) in long-term follow-up is unknown. Objectives: To study the impact of radiofrequency catheter ablation on various arrhythmias in patients with pacemakers and implantable cardiac defibrillators. Methods: We studied 119 consecutive patients with pacemakers and defibrillators who underwent various catheter-based procedures from 2011 to 2018. Various generator and lead parameters were compared before and after the procedure using paired sample t-test. Incidence of device-related complications was recorded as a percentage. Results: The mean age was 64.5 years. 88 patients had CHF (73.9 %). 63 Patients had CAD (52.9 %). 8.93 % and 41.3 % of patients had single and dual-chamber ICDs respectively. The rest of the patients had dual-chamber or biventricular pacemakers. 63.2 % of patients had Pulmonary Vein Isolation, Atrial Tachycardia, or Atrial Flutter ablation. 13.5 % of patients had AVNRT ablation and 20.3 % of patients had PVC or VT ablation. The Median follow-up interval was 8 weeks. No changes in before or after the ablation procedure in the atrial sensing ( 3.37± 1.60mV vs 3.40 ± 1.95 mV , P .52) and pacing thresholds ( 0.85mV± 0.46mV vs 0.82± 0.43 mV, P .35) , impedance (471.83± 106 ohm vs 447.57± 88.64 ohm , P .07) was noticed. Similarly, there was no difference in RV lead sensing and pacing threshold, but paradoxically there was a decrease in RV impedance after ablation (549.77± 173ohm vs 507.40 ± 129.0 ohms, p <0.004). There was no difference in the LV lead parameters. There were no complications as lead dislodgement, stroke, hypotension, or death. Conclusion: Any type of catheter-related ablation is safe and efficacious in patients with pacemakers and defibrillators and there was no generator or lead-related complications noticed on interval follow-up.
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