the positive electrode is placed in secondary ( or rechargeable ) cell in lead iii.
the positive electrode is placed in secondary ( or rechargeable ) cell in lead iii.
where is the positive electrode placed in lead iii?
secondary ( or rechargeable ) cell
bullet::::- lead iii — this axis goes from the left shoulder (negative electrode) to the right or left leg (positive electrode). this results in a +120 degree angle of orientation.









































electrodes may be placed distally or proximally on the limb without affecting the recording. the right leg electrode acts to reduce interference, and can be placed anywhere without an effect on the ecg results.
einthoven's triangle
bullet::::- lead i — this axis goes from shoulder to shoulder, with the negative electrode placed on the right shoulder and the positive electrode placed on the left shoulder. this results in a 0 degree angle of orientation.









































bullet::::- lead ii — this axis goes from the right arm to the left leg, with the negative electrode on the shoulder and the positive one on the leg. this results in a +60 degree angle of orientation.
einthoven's triangle