Which of the following is the order of activation after stimulation of Purkinje fibers is
Order of depolarization in the heart.
-        First- Left side of interventricular septum
-        Moves to right across the mid-portion of the septum
-        Apex of heart
-        Along ventricular walls to AV groove (Endocardium to epicardium)
-        Last- Posterobasal portion of the left ventricle, pulmonary conus, uppermost portion of the septum.
Septum → Endocardium → Epicardium
Endocardium → Septum → Epicardium
Epicardium → Septum → Endocardium
Septum → Epicardium → Endocardium