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