Cardiac Electrical System Versión en línea Conduction System of the Heart por Linu John 1 Sinoatrial Node 2 Atrioventricular Node 3 Bundle of His 4 Right and Left Bundle branches 5 Purkinje Fibers SA NODE Upper Right Atrial Wall Primary pacemaker 60-100 BPM Bottom of the right atrium Delays impulse from the SA Node because it contains non-conductive tissue. Relays it to the bundle of His 40-60 BPM AV Node Upper interventricular septum Relays impulse to right and left bundle branches Interventricular septum Relays impulse to Purkinje Fibers Ventricular myocardium Relay impulse to ventricular myocardium Intrinsic rate 20-40 BPM
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