Cardiac impulse originate in SAnode then reach the AV node there is AV nodal delay
SAN - AVN -Delay
Conduction in the ventricle
Depolarization - Start - Left side of interventricular Septum
Moves to the right
Spreads down to the apex
Returns along the ventricular wall to the AV groove
Last part of Depolarization:
Posterobasal portion of the Lt.Ventricle, Pulmonary Conus, Upper most portion of the Septum.
Different cardiac rhythms
Sinus rhythm is normal
Nodal rhythm
Idio ventricular rhythm
Normal pacemaker
SAnode
Abnormal pacemaker (ectopic pacemaker)
A pacemaker elsewhere than the sinus node. They produce arrhythmia
Common abnormal pacemaker:
AV node or Purkinje fibers
Atrial or ventricular muscle.
