title: Four years experience of cardiac pacemaking with the Devices asynchronous generator.
mesh_terms: D000367:Age Factors; D000368:Aged; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D010138:Pacemaker, Artificial / Q000295:instrumentation*; D013223:Statistics as Topic; D013997:Time Factors