Electrical conducting system of the heart Electrical conducting system of the heart. Sinoatrial node → atrial muscle → atrioventricular node → bundle of His → bundle branches → Purkinje fibers → ventricular muscle. Source: Cardiovascular Physiology, Medical Physiology: The Big Picture Citation: Kibble JD, Halsey CR. Medical Physiology: The Big Picture; 2015 Available at: https://accessmedicine.mhmedical.com/DownloadImage.aspx?image=/data/books/1291/p9780071485678-ch004_f005.png&sec=75576508&BookID=1291&ChapterSecID=75576461&imagename= Accessed: October 31, 2017 Copyright © 2017 McGraw-Hill Education. All rights reserved