Cardiac Telemetry Questions and Answers

Normal Conduction System -ANSWER -SA Node = Primary Pacemaker of the Heart, rate of 60-100 bpm -Internodal Pathways = Pathways connecting SA Node and AV Node -AV Node = Backup pacemaker, rate of 40-60 bpm -Bundle of His = splits nerve fibers down Left & Right Sides, His-Purkinje is conduction system of heart -L & R Bundle Brancehs = lead to left & right of the myocardium -Purkinje Fibers / Network = ends of the muscle, last escape pacemaker sites rate of 14-40 Tele Strip Paper -ANSWER -Small box = 0.04 sec -Large boxes = 5 x 5 small boxes, 0.20 sec SA Node Rate -ANSWER 60-100 bpm AV Node Rate -ANSWER 40-60 bpm Ventricles / Purkinje Fibers Rate -ANSWER 20-40 bpm Tele Tracing Waves -ANSWER P-wave -PR-Interval (PRI) = 0.12 - 0.20 sec -QRS complex = 0.08-0.12 sec T-wave Q-wave U-wave Normal PRI -ANSWER 0.12-0.20 sec (3-5 small squares) -Indicates AV conduction time -Measure from P wave start to QRS wave -Consider heart blocks if abnormal