Mortara X12 Plus, User Manual

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SECTION 2
10
Positioning the Electrodes for 10-wire (12-lead) Hookup
Limb Electrodes
AAMI IEC Placement
RA R Right clavicle as shown
LA L Left clavicle as shown
RL N Reference or ground lead, placed to maximize patient comfort
LL F Lower left side of body, as close to hip as possible, on the iliac crest (original
Mason-Likar position) or lowest rib on the left side of chest (modified Mason-
Likar position)
Precordial Electrode
AAMI IEC
Placement
V1 C1 Fourth intercostal space at the right sternal border
V2 C2 Fourth intercostal space at the left sternal border
V3 C3 Midway between V2 and V4
V4 C4 Fifth intercostal space at the left midclavicular line
V5 C5 Anterior axillary line on same horizontal level as V4
V6 C6 Mid-axillary line on the same horizontal level as V4 and V5
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.