Cardiac pacemakers: safety and efficacy of implantable transvenous units.
D000328:Adult; D000368:Aged; D004869:Equipment Safety; D005260:Female; D006327:Heart Block / Q000628:therapy; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D008875:Middle Aged; D010138:Pacemaker, Artificial / Q000009:adverse effects*