Effect of pacemaker output coupling capacitor on intracardiac evoked response sensing

Author

Zhu, Qingsheng ; Lang, Douglas J.

Author_Institution

Dept. of Therapy Res., Guidant Corp., St. Paul, MN, USA

fYear

1998

fDate

29 Oct-1 Nov 1998

Firstpage

420

Abstract

Intracardiac evoked response has been used in implantable pacemakers for the application of automatic capture verification. However, reliable detection of evoked response has always been hampered by large residual after potentials associated with pacing stimuli. This article analyzes the cause of the after potential and proposes a solution for evoked response detection through reducing the coupling capacitor in the pacemaker output circuitry. The proposal was tested clinically to evaluate the impact of the capacitance reduction on evoked response sensing as well as on the associated pacing threshold changes

Keywords

biocontrol; bioelectric potentials; capacitor storage; medical signal detection; pacemakers; prosthetic power supplies; automated interleaved pacing; automatic capture verification; capacitance reduction; coupling capacitor replacement; depolarization electric potential; implantable pacemakers; intracardiac evoked response sensing; large residual after potentials; pacemaker output circuitry; pacemaker output coupling capacitor; pacing stimuli; pacing threshold changes; sense amplifier; Capacitance; Capacitors; Circuits; Erbium; Heart; Pacemakers; Polarization; Pulse amplifiers; Switches; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Engineering in Medicine and Biology Society, 1998. Proceedings of the 20th Annual International Conference of the IEEE

Conference_Location

Hong Kong

ISSN

1094-687X

Print_ISBN

0-7803-5164-9

Type

conf

DOI

10.1109/IEMBS.1998.745934

Filename

745934