Matching Pairs Ch. 8 Cardiac Conduction Online version Cardiac Electrical System by Linu John 1 P wave 2 T wave 3 QRS Complex ventricular depolarization atrial depolarization ventricular repolarization 1 Isoelectric line 2 interval 3 positive deflection 4 wave 5 negative deflection 6 complex baseline or flat portion several waves that are measured together wave plus a segment downward deflection deflection away from the baseline upward deflection 1 Purkinje Fibers 2 AV Node 3 Bundle Branches 4 Bundle of His 5 SA node 40- 60 bpm (has two routes) 40-60 bpm (step after SA node) 40-60 bpm (named after a MD) 60-100 bpm 20-40 bpm 1 PR Interval 2 QT interval 3 QRS Interval 4 ST segment 5 R-R interval should be regular should stay at baseline 0.12- 0.20 second 0.36 to 0.44 second less than 0.12 second