The ECG leads, and their corresponding locations are as follows:
Electrode connection 1
(IEC Standard)
Label on lead
Color code
wire
Red
R
Yellow
L
Green
F
Black
N/RF
White
C
White/Red
C1
White/Yellow
C2
White/Green
C3
White/Brown
C4
(Blue)
White/Black
C5
White/Purple
C6
Electrode connection 2
(AHA Standard)
Label on lead
Color code
wire
White
RA
Black
LA
Red
LL
Green
RL
Brown
V
Brown
V1
Brown/Yellow
V2
Brown/Green
V3
Brown/Blue
V4
Brown/Red
V5
Brown/Purple
V6
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Electrode position on body surface
Right Arm: The intersection between the
centerline of the right clavicle and Rib 2
Left Arm: The intersection between the
centerline of the left clavicle and Rib 2
Left Leg: Left part of the upper abdomen
Right Leg: Right part of the upper
abdomen
Any of the following location (C1-C6 or
V1-V6) on chest
th
4
Intercostal (IC) space at the right
border of the sternum
th
4
IC space at the left border of the
sternum
Midway between V2 and V4
th
5
IC space on left midclavicular line
Left anterior axillary line at the
horizontal level of V4
The left midaxillary line at the horizontal
level of V4