title: Action of verapamil on the sinus node recovery time and AV conduction studied by His bundle recordings.
mesh_terms: D000293:Adolescent; D000328:Adult; D002036:Bundle of His / Q000502:physiology; D003327:Coronary Disease / Q000503:physiopathology; D004562:Electrocardiography; D006331:Heart Diseases / Q000503:physiopathology; D006339:Heart Rate / Q000187:drug effects; D006801:Humans; D008875:Middle Aged; D012849:Sinoatrial Node / Q000187:drug effects*; D014700:Verapamil / Q000494:pharmacology* / Q000627:therapeutic use
chemical_list: D014700:Verapamil