Cardiac Telemetry questions and answers

Cardiac Telemetry questions and answers
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

, Cardiac Telemetry questions and answers
-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 Postive Deflection

S-Wave= Negative Deflection following R-Wave