The development of the His bundle recording technique.
D000818:Animals; D002036:Bundle of His / Q000502:physiology*; D006328:Cardiac Catheterization / Q000379:methods; D002304:Cardiac Pacing, Artificial / Q000266:history; D004285:Dogs; D004594:Electrophysiology / Q000266:history* / Q000379:methods; D006329:Heart Conduction System / Q000502:physiology*; D049673:History, 20th Century; D006801:Humans; D014481:United States