<Dl> <Dd> I I = L L − R A (\ displaystyle II = LL - RA) </Dd> </Dl> <Dd> I I = L L − R A (\ displaystyle II = LL - RA) </Dd> <Ul> <Li> 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 . </Li> </Ul> <Li> 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 . </Li>

Where is the positive electrode placed in lead iii