Philips IntelliVue TRx Instructions For Use Manual page 103

Reconstructed Reconstruction of leads from the sourced wave is defined by the calculations in
Leads the following table. EASI reconstructed leads are a linear combination of all
three raw EASI leads.
Draft - 1 Aug 08
ECG Lead
5-Wire
3-Wire Standard
I I
II II
(default) (default)
III III
(default)
- MCL
- aVR
- aVL
- aVF
- V
(default)
Clinical Calculations
6-Wire in terms of electrodes
I LA-RA
II LL-RA
(default)
III LL-LA
(default)
V-LA, where V=C
aVR RA-(LA+LL)/2
aVL LA-(RA+LL)/2
aVF LL-(LA+RA)/2
V-(RA+LA+LL)/3, where V=C
Va Va-(RA+LA+LL)/3, where
Va=V2 (default) position
Vb Vb-(RA+LA+LL)/3, where Vb
=V5 (default) position
Measuring ECG
ECG Monitoring 6-9