title: Surface recording of electrical activity from the region of the bundle of His.
mesh_terms: D000818:Animals; D003936:Diagnosis, Computer-Assisted; D004285:Dogs; D004562:Electrocardiography; D006327:Heart Block / Q000503:physiopathology*; D006329:Heart Conduction System / Q000502:physiology* / Q000503:physiopathology; D008722:Methods; D011433:Propranolol
chemical_list: D011433:Propranolol