Electrode placement

Electrode placement


In this video we will speak about electrodes
placement for the standard 12-lead ECG 12-lead ECG is the standard ECG, it consists
of 12 leads and requires 10 electrodes. Difference in the color markings of limb lead
is somewhat confusing because of two systems for the markings of limb electrodes: IES (International
Electrotechnical Comission) and AHA (American Heart Association). According to AHA, electrode with the inscription
“RA” marked in white color and, according to IES, electrode with inscription “R”
marked in red color is placed on the right arm. According to AHA, electrode with the inscription “LA” marked in black color and, according
to IES, electrode with inscription “L” marked in yellow color is attached to the
left arm; According to AHA, electrode with the inscription
“LL” marked in red color and, according to IES, electrode with inscription “F”
marked in green color is placed on the left leg, on the lower end of inner aspect of the
calf muscle. Neutral electrode, according to IES, with
inscription “N” marked in black color, and according to AHA, with inscription “RL”
marked in green color is placed on the right leg, in the same place as LL. According to AHA, precordial electrodes are
marked as V1 to V6; according to IES, they are marked as C1 to C6. Precordial leads are placed on the anterior
surface of the chest in the following way: V1 or C1 is attached at the fourth intercostal
space at the right border of sternum. V2 or C2 is placed at the fourth intercostal
space at the left sternal border, it’s opposite to the V1 lead
V4 or C4 is attached at the fifth intercostal space at the left mid clavicular line. V3 or C3 is placed midway between the leads
V2 and V4. V5 or C5 is attached at the fifth intercostal
space at the left anterior axillary line V6 or C6 is placed at the fifth intercostal
space at the left mid axillary line

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