title: Progress in pacemaker longevity.
mesh_terms: D000367:Age Factors; D001674:Bioelectric Energy Sources; D003365:Costs and Cost Analysis; D006801:Humans; D007454:Iodides; D008094:Lithium; D008628:Mercury; D010138:Pacemaker, Artificial / Q000592:standards*; D011005:Plutonium / Q000009:adverse effects; D011399:Promethium / Q000009:adverse effects; D011829:Radiation Dosage; D011832:Radiation Injuries / Q000517:prevention & control; D012834:Silver; D013997:Time Factors; D015032:Zinc
chemical_list: D007454:Iodides; D012834:Silver; D011005:Plutonium; D008094:Lithium; D008628:Mercury; D015032:Zinc; D011399:Promethium