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Choose the best locations for limb lead placement according to body type. Avoid muscular and loose,
flabby skin locations.
Prevent pulling on the lead wires by means of strain relief as needed with use of surgical tape or a stress
vest available from most medical supply companies.
Figure 4 Electrode Positioning
*
NOTE AND CAUTION: Placement of the Left Leg (LL) electrode in the original Mason-Likar position
increases the similarity of the acquired ECG with a standard 12-lead ECG and is therefore recommended;
however, clothing may interfere with this position and increase the amount of artifact. The modified
position may decrease the sensitivity of inferior ECG leads and cause axis shift with respect to the standard
12-lead ECG. Accurate skin preparation and suitable clothing are the most important factors in excessive
artifact prevention.
NOTE: The Right Leg (RL) electrode may be positioned in any location least subject to motion artifact
according to clinician preference and specific test requirements.
CONDUCTING AN EXERCISE STRESS TEST
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