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ȣ - 480284 173 |
| The change of lead impedance over time |
| From Cardiovascular Institute, Department of Medicine, Samsung Medical center, Sungkyunkwan University School of Medicine |
| Yu Jeong Choi,MD, Pill Ho Kim,MD, Cheol woong You,MD, Il Lee,MD, Man Gi Park,MD, Joong Il Park, MD, Sang Hoon Lee,MD, Kyung Pyo Hong,MD, Jeong Euy Park,MD, June Soo Kim,MD |
Background: The serial measurement of pacing lead impedance over time is a useful tool to monitor pacing lead performance. We investigated the correlation with direct and telemetered lead impedance, and the change of lead impedance over time. Methods: Direct and telemetered lead impedance were measured in 108 patients ( 62.3±1.3 years, 49 males) during initial implantation between April, 1997 and April, 2000. All patients were examined at 2-month, 12-month after implantation, and then annually for 4 years at a pacemaker clinic. Results: In atrial leads, direct and telemetered lead impedance were 470.2±12.2 Ω and 540.9±11.6 Ω respectively at initial implantation (r=0.72, p<0.01). In ventricular leads, direct lead impedance was 623.7±14.6 Ω VS 717.0±17.3 Ω for telemetered lead impedance( r=0.82, p<0.01). In atrial leads, telemetered lead impedance rose to 583.0±14.0 Ω (p<0.01) at 2-month and stablized thereafter. Otherwise, in ventricular leads, it decreased to 653.6 Ω(p<0.01) at 2-month and then stablized. Conclusion: There were a good correlation between direct and telemetered lead impedance and a different tendency in lead impedance during lead maturation between atrial and ventricular lead. But telemetered lead impedance was substantially stable over time.
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