40-60 BPM
Upper interventricular septum
Primary pacemaker
Delays impulse from the SA Node because it contains non-conductive tissue. Relays it to the bundle of His
Upper Right Atrial Wall
Relays impulse to Purkinje Fibers
Intrinsic rate 20-40 BPM
Relay impulse to ventricular myocardium
Relays impulse to right and left bundle branches
Interventricular septum
SA NODE
Ventricular myocardium
60-100 BPM
Bottom of the right atrium
AV Node
