Septal Delay = Delay from CS pacing spike to peak QRS on lead II
Lateral Delay = Delay from Ablation distal at 7 o’clock pacing spike to peak QRS on lead II
Clockwise Delay = Delay from CS pacing spike to RA lateral catheter on distal electrodes
Counterclockwise Delay = Delay from RA lateral catheter on distal electrodes pacing spike to CS proximal
Delta PR interval = Lateral Delay – Septal Delay