Physiology What is the delay between the S-A node discharge and arrival of the action potential at the ventricular septum? A 0.80 second B 0.16 second C 0.12 second D 0.09 second 💡 Explanation What is the delay between the S-A node discharge and arrival of the action potential at the ventricular septum? ✓ Correct Answer: B. 0.16 second