PMID: 9554728Apr 29, 1998Paper

Temporal stability of defibrillation thresholds with an active pectoral lead system

Journal of Cardiovascular Electrophysiology
M R OlsovskyM R Gold

Abstract

Monophasic defibrillation thresholds rise over time with a variety of lead systems. These chronic changes are attenuated or eliminated by biphasic waveforms, although the effect appears dependent upon the lead system. With the downsizing of pulse generator size to allow for routine pectoral implantation, active can lead systems have now become standard. However, the temporal stability of such lead systems has not been evaluated previously. This study was a prospective assessment of the changes of active pectoral defibrillation thresholds over time. Thresholds were measured at implant, predischarge, and at a mean follow-up of 50 days in 46 patients with a uniform testing protocol and shock polarity. The lead system was a dual-coil Endotak DSP lead with an active pectoral pulse generator. Defibrillation thresholds were 9.9+/-5.5 J at implantation, 8.5+/-6.0 J predischarge, and 7.6+/-5.5 J at follow-up (ANOVA, P = 0.007). Moreover, only two patients developed an increased threshold > 5 J, and no patient had an inadequate safety margin at follow-up. These results indicate that active pectoral defibrillation thresholds are stable over the first 2 months postimplantation and question the need for routine serial defibrillation thresho...Continue Reading

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Citations

Feb 17, 1999·Pacing and Clinical Electrophysiology : PACE·C ButterJ Neuzner
Jun 29, 2000·Scandinavian Cardiovascular Journal : SCJ·M KesekC Blomström-Lundqvist
Jun 1, 2012·Cardiac Electrophysiology Clinics·Frank A Cuoco, Michael R Gold
Jun 19, 2010·Heart Rhythm : the Official Journal of the Heart Rhythm Society·Carl R ReynoldsMichael R Gold
Apr 28, 2007·Pacing and Clinical Electrophysiology : PACE·Charles D SwerdlowPaul J Degroot
Jan 15, 2009·Pacing and Clinical Electrophysiology : PACE·Ron D B SimonMichael R Gold
Nov 3, 2010·Pacing and Clinical Electrophysiology : PACE·William H SauerPaul D Varosy
Jun 27, 2000·Journal of Cardiovascular Electrophysiology·P A FriedmanM S Stanton
Apr 25, 2003·Pacing and Clinical Electrophysiology : PACE·Joerg CarlssonJoerg Neuzner

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