Intracavitary cardiac pacing.
D000368:Aged; D006328:Cardiac Catheterization; D004562:Electrocardiography; D005260:Female; D006327:Heart Block / Q000628:therapy*; D006335:Heart Injuries / Q000209:etiology*; D006352:Heart Ventricles; D006801:Humans; D008297:Male; D008875:Middle Aged; D010138:Pacemaker, Artificial / Q000009:adverse effects*