10-5
When attaching the chest electrode to the back of a patient, place it at one the following sites:
îš„ V7: On the 5th intercostal space at the left posterior axillary line of the back.
îš„ V7R: On the 5th intercostal space at the right posterior axillary line of the back.
Figure 10-3 Positions of Chest Electrode
The chart below shows the label used to identify each leadwire. Included also is its associated
color code per American (AHA) and European (IEC) standards.
American Standard European Standard
Label Color Label Color
RA White R Red
LA Black L Yellow
LL Red F Green
RL Green N Black
V Brown C White
Electrode Placement for Surgical Patients
Electrode placement during surgery is dependent on the type of surgery being performed. For
example, with open chest surgery, the electrodes might be placed laterally on the chest or on the
back. In the operating room, artifact can sometimes affect the ECG waveform due to the use of
electrosurgery equipment. To help reduce this, place the electrodes on the right and left shoulders,
the right and left sides near the stomach, and place the chest lead on the left side at mid-chest.
Avoid placing the electrodes on the upper arms. This will cause the ECG waveform to be too
small.
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