Conduction system of the heart Action potential of cardiac tissues Cardiac cell architecture Blood supply of conduction tissue of heart Influence of autonomic nervous system on heart Conduction of impulse Cardiac cycle Electrical vector Recording and presentation of Electrical activity of the heart Parts and components of a normal ECG SA node Ionic Basis of Electrical Activity in Pacemaker Cells Secondary/ Latent pacemaker How Atrial impulse is transmitted? AV node Bundle of His Purkinje fibers/ventricular myocardium