Temperature dependent pulse generator dysfunction.
Malfunction of a lithium-powered R-wave inhibited unipolar pulse generator (CPI Model 0505) necessitated removal 15 months after implantation. Examination of the pulse generator in a water bath revealed abnormal function at temperatures above 31.5 degrees C and normal function at temperatures below 31.5 degrees C. CPI suggested that the failure was caused by the 10 kHz timing crystal in the generator.
D000368:Aged; D001281:Atrial Fibrillation / Q000150:complications; D004562:Electrocardiography; D004868:Equipment Failure; D005260:Female; D006327:Heart Block / Q000150:complications / Q000628:therapy*; D006801:Humans; D010138:Pacemaker, Artificial / Q000592:standards*; D013696:Temperature