title: Letter: Wenckebach periods and His-Purkinje conduction.
mesh_terms: D002037:Bundle-Branch Block / Q000175:diagnosis; D006327:Heart Block / Q000175:diagnosis / Q000503:physiopathology*; D006329:Heart Conduction System / Q000503:physiopathology*; D006339:Heart Rate; D006801:Humans; D013997:Time Factors