User's Manual

Operator’s Manual ZM-920PA/921PA/930PA/931PA 29
Six Electrodes
Electrode Position
The 6-electrode method with lead II and lead V5 is effective for monitoring
myocardial ischemia. You can improve monitoring accuracy considerably by
adding lead V4 to this combination. Va and Vb can be at any position of the
standard 12 leads V1 to V6, but V4 and V5 are most appropriate for myocardial
ischemic monitoring.
RA
LA
N (RL)
LL
Va
Vb
Symbol Lead Color (Clip Color) Electrode Position
RA White (White) Right infraclavicular fossa
LA Black (Black) Left infraclavicular fossa
LL Red (Red)
Lowest rib on the left anterior
axillary line
N (RL) Green (Green)
Right anterior axillary line at the
same level as LL
Va
Brown (Brown) (BR-906PA)
Brown-blue (BR-916PA)
Fifth intercostal space on the left
midclavicular line. (V4 position of
standard 12 leads)
Vb
Brown (Brown) (BR-906PA)
Brown-orange (BR-916PA)
Left anterior axillary line at the
same level as Va. (V5 position of
standard 12 leads)