Cardiac Telemetry study guide

Cardiac Telemetry study guide
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 Postive Deflection
S-Wave= Negative Deflection following R-Wave
Normal QRS Complex
0.08-0.12 sec (2-3 small squares)