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