User's Manual

Operator’s Manual ZM-520PA/521PA/530PA/531PA 39
Electrode Position
Follow the physician’s instructions for electrode placement when available.
For ECG monitoring, electrodes are attached only on the chest to allow patient movement
and obtain continuous stable ECG. The following leads are examples. When also monitoring
respiration, refer to the “Electrode Position for Respiration Monitoring” section.
NOTE
The optimum electrode positions for ECG measurement are not always optimum for
respiration measurement. Select positions that are suitable for both ECG and respiration
measurement or positions which give priority to either ECG or respiration measurement.
Electrode Positions for ECG Monitoring
Six Electrodes
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/R
LA/L
RL/RF
LL/F
Va/Ca
Vb/Cb
Electrode Position
Symbol Lead Color
AHA IEC AHA IEC
Left infraclavicular fossa LA L Black Yellow
Right infraclavicular fossa RA R White Red
Below lowest rib on the left anterior axillary line LL F Red Green
Right anterior axillary line at the same level as
LL/F
RL RF Green Black
Fifth intercostal space on the left midclavicular
line (V4 position of standard 12 leads)
Va Ca Brown-blue White-brown
Left anterior axillary line at the same level as Va
(V5 position of standard 12 leads)
Vb Cb Brown-orange White-black
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