Europace

Europace 2001 3(4):332-335; doi:10.1053/eupc.2001.0181
© 2001 by European Society of Cardiology

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PACING

Autocapture compatibility in patients with the MembraneEX lead and Affinity pulse generators

A. Schuchert, J. Voitk¹, B. Liu², R. Kolk³, E. Stammwitz⁴, J. Beiras⁵ on behalf of the Affinity MembraneEX Study Group

Department of Cardiology, University-Hospital Hamburg-Eppendorf Germany; ¹Mustamäe Hospital Estonia; ²St Jude Medical AB Sweden; ³University Hospital of Tartu Estonia; ⁴District Hospital Leer Germany; ⁵Hospital Xeral Cies Spain

Abstract

The first Autocapture generation worked well with all recommended leads. The newer Autocapture generation provides a more sensitive resolution for evoked response testing and its implementation in a dual-chamber device. The purpose of the study was to evaluate the performance of the Affinity SR/DR pacemaker with the new Autocapture algorithm in combination with the small surface area pacing lead MembraneEX in 129 patients. Autocapture ventricular threshold, sensing threshold, lead impedance, evoked response (ER) and polarization signals were determined at implantation and discharge, as well as after 1 and 3 months. Autocapture recommendation rate was based on the ER sensitivity test. The median pacing threshold was 0·38, 0·50, 0·75, 0·75 V at implant, discharge, 1 and 3 months post-implant, respectively. The respective data for median lead impedance were 744, 605, 649 and 691 ohms; median sensing threshold was 12·5 mV at all visits. The median ER amplitude was 9·0, 10·1, 9·9 and 10·1 mV and the median polarization signal 0·39 mV at all visits. The frequency of recommended Autocapture activation was 98·3%, 99·2%, 98·3% and 96·2% of all patients at implant, at discharge, 1 and 3 months post-implant respectively. In conclusion, the studied pulse generator enabled, in combination with this pacing lead, in >95% of all patients activation of Autocapture.

Key Words: Ventricular Autocapture activation, high-impedance small-surface area electrode, pacing threshold, lead polarization, evoked response amplitude

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Correspondence: Andreas Schuchert, MD, Medical Clinic, Department of Cardiology, University-Hospital Hamburg-Eppendorf, Martinistr. 52, D 20246 Hamburg, Germany. E-mail: schuchert{at}uke.uni-hamburg.de

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References

[1] Clarke M, Liu B, Schüller H, et al. Automatic adjustment of pacemaker stimulation output correlated with continuously monitored capture thresholds: a multicenter study. Pacing Clin Electrophysiol 1998; 21: 1567–1575.[CrossRef][Medline]

[2] Schüller H, Kruse IB, Svennsson O, Mortensen P, et al. Long-term benefits of autocapture — four year of follow-up. Pacing Clin Electrophysiol 1999; 22: 807 (abstract).

[3] Schuchert A, Ventura R, Meinertz T. Autocapture Activation without theIntraoperative Evaluation of the Evoked Response Amplitude. Pacing Clin Electrophysiol 2000; 23: 321–324.[CrossRef][Medline]

[4] Kacet S, Jarwe M, Klug D. Evaluation of the compatibility of various bipolar pacing leads with Autocapture. Pacing Clin Electrophysiol 1998; 21: 825 (abstract).

[5] Lau C, Nishimura SC, Philippon F, et al. Polarization signal and evoked response characteristics in current endocardial electrodes. Pacing Clin Electrophysiol 1998; 21: 841 (abstract).

[6] Aggarwal RK, Connelly DT, Ray SG, Ball J, Charles RG. Early complication of permanent pacemaker implantation: no difference between dual and single chamber systems. Br Heart J 1995; 73: 571–575.[Abstract/Free Full Text]

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This Article Abstract FREE Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in ISI Web of Science Similar articles in PubMed Alert me to new issues of the journal Add to My Personal Archive Download to citation manager Search for citing articles in: ISI Web of Science (11) Request Permissions Disclaimer Google Scholar Articles by Schuchert, A. Search for Related Content PubMed PubMed Citation Articles by Schuchert, A. Social Bookmarking          What's this?