Passport V Operating Instructions 0070- 0-0704-02 4 - 25
ECG Monitoring Arrhythmia Alarms (optional)
4.7 Arrhythmia Alarms (optional)
Arrhythmia alarms are activated based on the patterns in the patient ECG waveform rhythms.
Beat detection for a 5-lead wire set is determined by using a combination of leads II and V.
When using a 3-lead wire set, beat detection is determined by using the lead being viewed.
The lethal and non-lethal arrhythmia alarms in this section may be detected by the arrhythmia
algorithm.
NOTE: Arrhythmia alarms are not available for the Neonate patient size.
4.7.1 Lethal Arrhythmia Alarms
A lethal arrhythmia is an arrhythmia that can be life threatening to a patient if left untreated.
Ventricular Tachycardia (V-Tach), Ventricular Fibrillation (V-Fib), and Asystole alarms are
classified as lethal arrhythmia alarms. These alarms automatically default to Alarm Priority 1
and cannot be changed.
NOTE: Lethal arrhythmia alarms are latched alarms. Even after the
alarming condition is resolved, a latched alarm will continue
until it is acknowledged by pressing the “Silence” or “Silence
All” key on the front panel keypad. If the alarm is
acknowledged while the lethal condition still exists, the audio
portion of the alarm will be silenced for the duration that is
selected from the “Silence For” list in the “Alarm Setup”
menu, but the alarm message will remain in message area A.
If a new lethal condition occurs while the initial lethal alarm
is silenced, the new lethal alarm will not break through but
not be silenced. If the lethal condition is resolved while the
alarm is silenced, the alarm will be terminated.
4.7.1.1 Asystole Alarm
An Asystole alarm is activated when no QRS complexes are detected for the configured
time period in the absence of Ventricular Fibrillation.
The time period range for an Asystole alarm is user-selectable from 3 to 10 seconds.
The Asystole alarm is a Priority 1 alarm event that produces:
• Alarm Priority 1 visual and audio alarm indicators.
•An Asystole text message above the ECG1 waveform area.
4.7.1.2 Ventricular-Fibrillation (V-FIB) Alarm
A V-FIB alarm is activated when a fibrillated waveform (P, QRS or T waves can no longer be
identified) is detected. V-FIB is defined as “irregular, disorganized electrical activity of the
heart”. The V-FIB detection algorithm runs in parallel to the beat detection algorithm and
continuously examines the incoming data.
The V-FIB alarm is a Priority 1 alarm event that produces:
• Alarm Priority 1 visual and audio alarm indicators.
•A V-FIB text message above the ECG1 waveform area.
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