Noise mode response at peak exercise in a DDD pacemaker.
The noise sampling period has been recognized as a cause of apparent sensing malfunction in demand pacemakers. Physiologic signals as well as external electromagnetic interference can cause certain demand pacemakers to remain refractory and escape asynchronously at a specified rate. In this case, noise mode reversion pacing at the programmed lower rate limit of a Cordis 415A DDD pacemaker was observed during exercise when P-waves fell within the noise sampling period.
B K
BK
Sudduth
D L
DL
Morris
E W
EW
Gertz
D002304:Cardiac Pacing, Artificial / Q000009:adverse effects; D004562:Electrocardiography; D006327:Heart Block / Q000503:physiopathology / Q000628:therapy; D006339:Heart Rate; D006801:Humans; D008297:Male; D008875:Middle Aged; D010138:Pacemaker, Artificial / Q000009:adverse effects*; D005082:Physical Exertion