title: Performance of cardiac pacemaker pulse generators.
mesh_terms: D004868:Equipment Failure; D006801:Humans; D008094:Lithium; D008628:Mercury; D009026:Mortality; D010138:Pacemaker, Artificial / Q000009:adverse effects; D015032:Zinc
chemical_list: D008094:Lithium; D008628:Mercury; D015032:Zinc