title: [Letter: The prevention of the entrance block in on-demand pacemakers].
mesh_terms: D006348:Cardiac Surgical Procedures / Q000379:methods*; D004562:Electrocardiography; D006327:Heart Block / Q000517:prevention & control*; D010138:Pacemaker, Artificial
vernacular_title: Zur Vermeidung des Entrance bloc bei On-demand-Herzschrittmachern