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Where are the twelve leads of heart movement connected, and where are each color connected?
Red, yellow, black and green are sandwiched in the left wrist, right wrist, right ankle and left ankle respectively.

V 1: the fourth intercostal space at the right edge of sternum.

V2: the fourth intercostal space of the left sternum.

V3: the midpoint of the connection between V2 and v4.

V4: the intersection of the left clavicle midline and the fifth intercostal space.

V5: The left axillary front line is on the same horizontal line as v4.

V6: The left axillary midline is level with v4.

V7: The left posterior axillary line is level with v4.

V8: Paravertebral level is the same as v4.