Faculty Collaboration Database

Long-term internal cardiac defibrillation threshold stability. Pacing Clin Electrophysiol 1989 Mar;12(3):443-50

Date

03/01/1989

Pubmed ID

2466270

DOI

10.1111/j.1540-8159.1989.tb02682.x

Scopus ID

2-s2.0-0024318465 (requires institutional sign-in at Scopus site)   33 Citations

Abstract

The automatic implantable cardioverter-defibrillator is tested intraoperatively with defibrillation trials to ensure effectiveness. It is unknown if the energy requirement for internal defibrillation remains stable and that once demonstrated effective, if the device will continue to be effective in terminating lethal ventricular arrhythmias. In this study, the defibrillation energy requirement was compared in 56 patients at the time of lead implantation to that obtained at the time of generator replacement. Mean time to generator replacement was 17. +/- 6.6 months. The defibrillation threshold was stable over that time (11.9 +/- 6.7 joules compared to 12.7 +/- 8.4 joules, NS). There was no relation between transmyocardial impedance and defibrillation threshold. In addition, no effect on defibrillation threshold was demonstrated by the use of various cardiac medications, concomitant surgery or the occurrence of clinical shocks during follow-up.

Author List

Wetherbee JN, Chapman PD, Troup PJ, Veseth-Rogers J, Thakur RK, Almassi GH, Olinger GN

Author

G Hossein Almassi MD Professor in the Surgery department at Medical College of Wisconsin

MESH terms used to index this publication - Major topics in bold

Electric Countershock
Electric Power Supplies
Equipment Failure
Female
Follow-Up Studies
Humans
Intraoperative Care
Male
Middle Aged
Time Factors
Ventricular Fibrillation