PMID: 6167954Jul 1, 1981Paper

An evaluation of long-term stimulation thresholds by measurement of chronic strength duration curve

Pacing and Clinical Electrophysiology : PACE
J K HynesJ M Trusty

Abstract

Successful long-term cardiac pacemaker therapy requires both reliable generator output and stable, attainable chronic stimulation thresholds. Strength duration curves, which display cardiac stimulation thresholds as a function of impulse duration, provide needed data to evaluate more thoroughly acute and chronic lead thresholds. We measured chronic strength duration curves at the time of generator replacement in 47 patients with three different types of lead systems of variable geometry and surface area and compared these curves with acute strength duration curves measured at the time of initial implantation in 19 patients. We found that strength duration curves has a characteristic shape; however, chronic strength duration curves were shifted upward and to the right of acute strength duration curves, regardless of electrode tip surface area or geometric design. Our data suggest that variable pulse width exceeding 1 ms may not significantly reduce stimulation thresholds.

References

Jul 1, 1977·American Heart Journal·S FurmanR Mehra
Aug 1, 1977·The American Journal of Cardiology·R M LuceriD J Escher
Sep 1, 1975·The Journal of Surgical Research·S FurmanB Parker

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Citations

Apr 28, 2007·Pacing and Clinical Electrophysiology : PACE·Monique ScallyRichard M Greenberg
Aug 30, 2000·Pacing and Clinical Electrophysiology : PACE·S Coates, B Thwaites
Jul 1, 1981·Pacing and Clinical Electrophysiology : PACE·D L HayesJ Fetter
Mar 1, 1983·Pacing and Clinical Electrophysiology : PACE·A Ripart, J Mugica
Jun 1, 1993·Pacing and Clinical Electrophysiology : PACE·A G Del BufaloL Kappenberger

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