The isotopic cardiac pacemaker.
D001145:Arrhythmias, Cardiac / Q000401:mortality / Q000628:therapy; D001674:Bioelectric Energy Sources / Q000592:standards*; D003362:Cost-Benefit Analysis; D005500:Follow-Up Studies; D006801:Humans; D008004:Licensure; D008094:Lithium; D010138:Pacemaker, Artificial / Q000592:standards*; D011005:Plutonium; D013997:Time Factors; D014481:United States
D011005:Plutonium; D008094:Lithium