Electrical Activity of the Heart PDF

Chapter 9 Heart: Myocardium and Cardiac Cycle Electrical Activity of the Heart Contraction of the heart depends on electrical stimulation of the myocardium Conduction system – Sinoatrial node (SA node)  Pacemak...

Chapter 9 Heart: Myocardium and Cardiac Cycle Electrical Activity of the Heart Contraction of the heart depends on electrical stimulation of the myocardium Conduction system – Sinoatrial node (SA node)  Pacemaker, initiates depolarization – Atrioventricular node (AV node)  Passes depolarization to ventricles  Brief delay to allow for ventricular filling – Bundle Branches  To left and right ventricle – Purkinje fibers  Throughout ventricles Chapter 9 Heart: Myocardium and Cardiac Cycle Conduction System of the Heart Figure 9.9