Operator's Manual

Monitoring ECG Arrhythmia Monitoring
TM80/TM70 Telemetry Monitor Operator’s Manual 7 - 25
7.9.2 Arrhythmia Events
This section lists all arrhythmia events and their criteria.
7.9.2.1 Lethal Arrhythmia Events
CAUTION
• Since the arrhythmia detection algorithm sensitivity and specificity are
less than 100%, sometimes there may be some false arrhythmias
detected and also some true arrhythmia events may not be detected.
This is especially true when the signal is noisy.
• The ECG size and minimum QRS detection threshold settings affect
arrhythmia detection and heart rate calculation sensitivity.
• If QRS amplitude is low, the monitor might not be able to calculate heart
rate and false asystole calls may occur.During the learning phase of the
algorithm, arrhythmia detection may not be available. So you should
closely monitor patient condition during and for several minutes after
the learning phase to allow the algorithm to reach optimal detection
performance.
Arrhythmia message Description
Asystole No QRS complex detected within the set time interval in the
absence of ventricular fibrillation or chaotic signal.
V-Fib/V-Tach A fibrillatory wave for 6 consecutive seconds.
A dominant rhythm of adjacent PVCs and the ventricular rate
is greater than the V-tach rate limit.
V-Tach The number of consecutive PVCs is greater than or equal to
the V-Tach PVCs limit, and the ventricular rate is greater than
or equal to the V-Tach rate limit.