Which is TRUE for potentials in Einthoven’s triangle?
[A] I + II = III
[B] I + III = II
[C] I – III = II
[D] III + II = I
Einthoven’s triangle
Einthoven’s triangle
- I = LA – RA
- II = LL- RA
- III = LL – LA
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.
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.
Lead III — This axis goes from the left shoulder (negative electrode) to the right or left leg (positive electrode).
