why bipolar limb lead 3 in ecg is placed on left leg instead of right one?

while we are recording ecg ,then we place bipolar limb lead 3 on left leg why it is?

Authored By diya shona on Saturday 8th June 2013


Tanguy Lafont
Medical Student - St. Georges University, London
Posted over 6 years ago

When doing a 12-lead ECG, the trace is obtained by recording activity along different axes:
-Lead 1: is the recording of the activity using the electrodes on the right and left arms. This is considered to be the horizontal, or 0 degrees.