User's Manual

Selecting the Primary and Secondary ECG Leads
6-8 ECG and Arrhythmia Monitoring
Selecting the Primary and Secondary ECG Leads
When multilead analysis is used, the MX40 uses the primary and secondary
lead selected at the Information Center to compute HR and to analyze and
detect cardiac arrhythmias. They are also available for recordings and for
display on the Information Center.
Only the primary lead is used if your device is configured for single lead
arrhythmia analysis.
You should choose a lead as primary or secondary lead at the Information
Center that has the following characteristics:
 the QRS complex should be either completely above or below the
baseline and it should not be biphasic
 the QRS complex should be tall and narrow
 the P-waves and T-waves should be less than 0.2 mV