Improved discrimination of VT from SVT in dual-chamber ICDs by combined analysis of dual-chamber intervals and ventricular electrogram morphology

Author

Brown, M.L. ; Christensen, J.L. ; Gillberg, J.M.

Author_Institution

Medtronic Inc., Fridley, MN, USA

fYear

2002

fDate

22-25 Sept. 2002

Firstpage

117

Lastpage

120

Abstract

The PR Logic dual-chamber defection algorithm discriminates VT/VF from SVT using hierarchical rules based on the pattern and timing of AA, VV, AV, and VA intervals. It cannot always discriminate rapidly-conducted atrial fibrillation(AF) from double tachycardia. Coexisting AF and VT/VF, or SVT with 1:1 antegrade conduction from VT with 1:1 retrograde conduction. This study evaluated a new tachyarrhythmia detection algorithm that supplements analysis of dual-chamber intervals with analysis of ventricular electrogram morphology based on the Wavelet Dynamic Discrimination Algorithm. Combined analysis of dual-chamber intervals and ventricular electrogram morphology reduced inappropriate detection of SVTs by 79% compared to dual chamber intervals alone without compromising sensitivity for detection of VT/VF.

Keywords

electrocardiography; medical signal processing; wavelet transforms; PR Logic dual-chamber defection algorithm; Wavelet Dynamic Discrimination Algorithm; antegrade conduction; double tachycardia; hierarchical rules; rapidly-conducted atrial fibrillation; retrograde conduction; tachyarrhythmia detection algorithm; ventricular electrogram morphology; Algorithm design and analysis; Counting circuits; Detection algorithms; Event detection; Flowcharts; Logic devices; Medical treatment; Morphology; Pattern analysis; Rhythm;

fLanguage

English

Publisher

ieee

Conference_Titel

Computers in Cardiology, 2002

ISSN

0276-6547

Print_ISBN

0-7803-7735-4

Type

conf

DOI

10.1109/CIC.2002.1166721

Filename

1166721