title: Programmable pacemaker. Two year study.
mesh_terms: D000328:Adult; D000368:Aged; D055590:Electromagnetic Phenomena; D005260:Female; D006331:Heart Diseases / Q000628:therapy*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010138:Pacemaker, Artificial / Q000295:instrumentation*