title: Type I, type II, and type 3 gaps in bundle-branch conduction.
mesh_terms: D002037:Bundle-Branch Block / Q000145:classification / Q000175:diagnosis / Q000503:physiopathology*; D004562:Electrocardiography; D006325:Heart Atria; D006329:Heart Conduction System / Q000503:physiopathology*; D006801:Humans; D010138:Pacemaker, Artificial