Title :
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
fDate :
29 Oct-1 Nov 1998
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;
Conference_Titel :
Engineering in Medicine and Biology Society, 1998. Proceedings of the 20th Annual International Conference of the IEEE
Conference_Location :
Hong Kong
Print_ISBN :
0-7803-5164-9
DOI :
10.1109/IEMBS.1998.745934
