Cardiac Telemetry EXAM | questions and answers 2023/24
Cardiac Telemetry EXAM | questions and answers 2023/24 Normal Conduction System -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 -Small box = 0.04 sec -Large boxes = 5 x 5 small boxes, 0.20 sec SA Node Rate 60-100 bpm AV Node Rate 40-60 bpm Ventricles / Purkinje Fibers Rate 20-40 bpm Tele Tracing Waves 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 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 Normal Etiology SA Node Firing of SA Node causing depolarization of Atria. The impulse travels from SA node, through internodal pathways to AV node, where it is delayed for short amount of time. (PRI) Tele Tracing QRS Complex Q-Wave = 1st Negative Deflection R-Wave = 1st P
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