Evaluation of Electrode Impedance, Sensing, and Pacing Threshold Changes at 12 Hours After Pacemaker Implantation

Objective: The aim of this study was to evaluate the early changes in electrode impedance, sensing, and pacing threshold values within the first 12 hours after pacemaker implantation. Methods: A total of 50 patients who underwent device implantation between January and December 2024 were included in this prospective study. Lead impedance, sensing amplitude, and pacing threshold were measured immediately after implantation and reassessed at 12 hours post-implantation. Changes between the two time points were statistically analyzed. Results: Lead impedance values significantly decreased within the first 12 hours following implantation (p0.05). Both atrial and ventricular leads demonstrated similar patterns in impedance reduction without compromising sensing or pacing efficacy. Conclusion: This study demonstrates that a significant early decrease in lead impedance occurs within the first 12 hours after pacemaker implantation, while sensing and pacing thresholds remain stable. These findings confirm the short-term reliability of modern pacing and defibrillation leads and highlight the importance of early monitoring of lead parameters following device implantation.