title: Widening of the QRS complex during atrial pacing: what is the mechanism?
authors.affiliation: Department of Internal Medicine, University of Michigan, Ann Arbor 48109-0022, USA. fmorady@umich.edu
authors.forename: Fred
authors.initials: F
authors.lastname: Morady
mesh_terms: D005117:Cardiac Complexes, Premature / Q000209:etiology* / Q000628:therapy*; D002304:Cardiac Pacing, Artificial; D004562:Electrocardiography; D022062:Electrophysiologic Techniques, Cardiac; D006325:Heart Atria / Q000473:pathology* / Q000601:surgery*; D006329:Heart Conduction System / Q000473:pathology / Q000601:surgery; D006801:Humans; D008297:Male; D008875:Middle Aged; D011226:Pre-Excitation Syndromes / Q000209:etiology / Q000628:therapy