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