title: The influence of vagal activity on heart block; a study of the effect of oxygen, mecholyl, and atropine on auriculoventricular conduction time.
authors.forename: A L
authors.initials: AL
authors.lastname: MESSER
authors.forename: C K
authors.initials: CK
authors.lastname: DONEGAN
authors.forename: E S
authors.initials: ES
authors.lastname: ORGAIN
mesh_terms: D001285:Atropine; D006321:Heart; D006327:Heart Block; D006339:Heart Rate; D006801:Humans; D016210:Methacholine Chloride; D010100:Oxygen
chemical_list: D016210:Methacholine Chloride; D001285:Atropine; D010100:Oxygen