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
Answer is B. The impulse coming from the S-A node to the A-V node arrives at 0.03 second. Then there is a total delay of 0.13 second in the A-V node and bundle system, allowing the impulse to arrive at the ventricular septum at 0.16 second