4 Electrode placement
4.6 Left posterior C7-C9
Page 34
CT8000P-2
Art. no.: 2.511407 Rev.: a
4.6 Left posterior C7-C9
If an acute coronary occlusion is strongly suspected, it is recommended to also
register posterior chest wall leads (C7–C9)
C7 (C1 Red)
R red
N black
C8 (C2 Yellow)
C9 (C3 green)
C4 brown
C6 violet
C5 black
F green
L yellow
IEC label AHA label Action Alignment
C7 (C1 white /red) V7 (V1 brown / red) Left posterior axillary line at the level of C4.
C8 (C2 white /yellow) V8 (V2 brown / yellow) Left of the mid-scapular line at the level of C4.
C9 (C3 white /green) V9 (V3 brown / green) Left paravertebral line at the level of C4.
C4 white / brown V4 brown / blue
Fifth intercostal space on the mid-clavicular line.
C5 white / black V5 brown / orange
Anterior axillary line on the same horizontal level as C4.
C6 white /violet V6 brown / violet
Mid-axillary line on the same horizontal level as C4.
L yellow LA Black Left arm
R red RA White Right arm
F green LL Red Left foot
N black RL Green Right foot
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