Inappropriate pauses during bradycardia pacing in a third-generation implantable cardioverter defibrillator.

Publication/Presentation Date

9-1-1997

Abstract

Many ICD devices have the capability for back up bradycardia pacing. Because of the use of a single sensing algorithm for both bradycardia and tachycardia functions, they may be prone to certain "sensing errors." Following implantation of an ICD in a patient with long QT syndrome, "inappropriate" pauses were noted during bradycardia pacing, which were exactly twice the programmed pacing cycle length. This was due to an automatic increase in the device's sensitivity during pacing, a characteristic of the automatic gain control of this particular ICD. Proper recognition of this ICD's special features, known as "lower threshold crossing," allowed noninvasive rectification of the problem and prevented these pauses.

Volume

20

Issue

9 Pt 1

First Page

2271

Last Page

2274

ISSN

0147-8389

Disciplines

Medicine and Health Sciences

PubMedID

9309755

Department(s)

Department of Medicine

Document Type

Article

Share

COinS