title: Results of permanent cardiac pacing with Soviet implantable pacemakers.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010138:Pacemaker, Artificial; D013223:Statistics as Topic; D014586:USSR