8-16 
 
8.7 About Arrhythmia Monitoring 
Arrhythmia analysis provides information about your patient’s condition, including heart rate, 
PVC rate, rhythm and ectopics. 
 
 WARNING 
z  Arrhythmia analysis program is intended to detect ventriculararrhymias and atrial 
fibrillation. It is not designed to detect all the atrial or supraventricular 
arrhythmias. It may incorrectly identify the presence or absence of an arrhythmia. 
Therefore, a physician must analyze the arrhythmia information with other clinical 
findings.
z  Atrial fibrillation (Afib) detection function is not intended for pediatric and 
neonatal patients. 
z  Heart-rate reading may be affected by cardiac arrhythmias. Do not rely entirely on 
heart rate alarms when monitoring patients with arrhythmia. Always keep these 
patients under close surveillance. 
 
8.7.1 Understanding the Arrhythmia Events 
Arrhythmia message  Description  Category 
Asystole 
No QRS detected within the set time threshold in 
absence of ventricular fibrillation or chaotic signal. 
Lethal 
arrhythmia 
VFib/VTac 
A fibrillatory wave for 6 consecutive seconds. 
A dominant rhythm of adjacent Vs and a HR > the 
V-Tac HR limit. 
Vtac 
The consecutive PVCs  Vtac PVCs limit, and the HR  
the Vtac rate limit. 
Ven t .  B r a d y  
The consecutive PVCs  the Vbrd threshold and the 
ventricular HR < the Vbrd Rate threshold. 
Extreme Tachy 
The heart rate is equal to or greater than the extreme 
tachycardia limit. 
Extreme Brady 
The heart rate is equal to or less than the extreme 
bradycardia limit. 
PVCs/min  PVCs/min exceeds high limit 
Nonlethal 
arrhythmia 
Pacer Not Pacing 
No pace pulse detected for 1.75 x average R-to-R 
intervals following a QRS complex (for paced patients 
only). 
Pacer Not Capture 
No QRS complex detected for 300 ms following a pace 
pulse (for paced patients only).