User's Manual

5-26 ECG and Arrhythmia Monitoring
Aberrantly-Conducted Beats
As P-waves are not analyzed, it is difficult and sometimes impossible for
the monitor to distinguish between an aberrantly-conducted
supraventricular beat and a ventricular beat. If the aberrant beat resembles
a ventricular beat, it is classified as ventricular. You should always select a
lead where the aberrantly-conducted beats have an R-wave that is as
narrow as possible to minimize incorrect calls. Ventricular beats should
look different from these 'normal beats'. Instead of trying to select two leads
with a narrow R-wave, it may be easier to just select one lead and use single
lead arrhythmia monitoring. Extra vigilance is required by the clinician for
this type of patient.
Intermittent Bundle Branch Block
Bundle branch and the other fascicular blocks create a challenge for the
arrhythmia algorithm. If the QRS during the block changes considerably
from the learned normal, the blocked beat may be incorrectly classified as
ventricular, causing false PVC alarms. You should always select a lead
where the bundle branch block beats have an R-wave that is as narrow as
possible to minimize incorrect calls. Ventricular beats should look different
from these 'normal beats'. Instead of trying to select two leads with a
narrow R-wave, it may be easier to just select one lead and use single lead
arrhythmia monitoring. Extra vigilance is required by the clinician for this
type of patient.
ECG and Arrhythmia Alarm Overview
The ECG and arrhythmia alarms available depend on which measurements
are switched on, and the arrhythmia option enabled for your MX40.
Basic arrhythmia alarms are available when Arrhythmia is switched on
Enhanced arrhythmia alarms are available when the Enhanced Arrhythmia
option has been enabled for your device. To check your enabled settings,
view the Standby screen.
Alarms with Basic Arrhythmia
Option
Additional Alarms with Enhanced
Arrhythmia Option
***Asystole
**Afib
***Ventricular
Fibrillation/Tachycardia
**Supraventricular Tach
***Extreme Bradycardia
**Missed Beat
***Extreme Tachycardia
**Pause
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