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 wave 2 complex 3 Isoelectric line 4 negative deflection 5 interval 6 positive deflection downward deflection baseline or flat portion deflection away from the baseline wave plus a segment several waves that are measured together upward deflection 1 Bundle of His 2 Purkinje Fibers 3 SA node 4 AV Node 5 Bundle Branches 40-60 bpm (step after SA node) 40- 60 bpm (has two routes) 20-40 bpm 40-60 bpm (named after a MD) 60-100 bpm 1 ST segment 2 QRS Interval 3 R-R interval 4 PR Interval 5 QT interval should be regular 0.12- 0.20 second less than 0.12 second should stay at baseline 0.36 to 0.44 second