P1 Patient Monitor User’s Manual
8-16
Arrhythmia function is applicable for detecting certain ventricular and atrial
arrhythmias, not all atrial or supraventricular arrhythmias. Sometimes, it may
detect wrong arrhythmia. Therefore, doctors must combine more clinical
manifestations to analyze arrhythmia information.
CAUTION：
Since the arrhythmia algorithm sensitivity and specificity is 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 amplitude of ECG waveform will affect the arrhythmia detection and
heart rate calculation sensitivity.
If the QRS amplitude is too low, the monitor may not be able to calculate the
heart rate and false asystole may occur.
Arrhythmia detection may not be available during ECG relearning. Therefore,
the patient’s state should be closely observed during ECG relearning and
within a few minutes after completion.
8.6.2. Arrhythmia Events
This section lists all arrhythmia events and their criteria.
Arrhythmia Events Description
Asystole There is no fluctuation or very small and slow waveform for 6
seconds.
Vent Fib/Tach Ventricular fibrillation waveform for 4 seconds.
V-Tach More than 5 (including 5) ventricular waveforms were detected
continuously, and the heart rate was greater than the ventricular
tachycardia heart rate limit.
Vent Brady More than 3 (including 3) ventricular waveforms were detected
continuously, and the heart rate was less than the ventricular
bradycardia limit.
Extreme Tachy Non-ventricular rhythm and the heart rate are greater than the extreme
tachycardia limit.
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