V1 - 4th intercostal space to the right of the sternum, V2 - 4th intercostal space to the left of the sternum, V3 - Directly between leads V2 & V4, V4 - 5th intercostal space at midclavicular line, V5 - level with v4 at left anterior axillary line, V6 - Level with V5 at midaxillary line directly under the midpoint of the armpit, RA - WHITE, LA - BLACK, RL - GREEN, LL - RED,

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