Entrance block: a previously unrecognized phenomenon associated with transthoracic demand pacemaker implantation.
D000200:Action Potentials; D000368:Aged; D006348:Cardiac Surgical Procedures; D004562:Electrocardiography; D005260:Female; D006321:Heart / Q000503:physiopathology*; D006327:Heart Block / Q000628:therapy; D006801:Humans; D008297:Male; D008875:Middle Aged; D010138:Pacemaker, Artificial / Q000009:adverse effects*