title: Basic principles of pacemakers--subject review.
mesh_terms: D004347:Drug Interactions; D006327:Heart Block / Q000145:classification / Q000503:physiopathology / Q000628:therapy; D006329:Heart Conduction System / Q000502:physiology*; D006801:Humans; D010138:Pacemaker, Artificial / Q000145:classification; D012848:Sinoatrial Block / Q000503:physiopathology