title: Electrocardiographic PR lengthening and QRS widening- what else should we learn from such simple information?
authors.forename: Toru
authors.initials: T
authors.lastname: Maruyama
authors.forename: Hisataka
authors.initials: H
authors.lastname: Nakamura
mesh_terms: D000075224:Cardiac Conduction System Disease; D016208:Databases, Factual; D004562:Electrocardiography; D005260:Female; D006327:Heart Block; D006333:Heart Failure; D006801:Humans; D008297:Male