Question

If you see interference on the leads 2 & AVF, which sensor/electrode would you check?

A) Right Arm (RA)
B) Left Leg (LL)
C) Right Leg (RL)
D) Left Arm (LA)

Answer 1

To resolve interference on leads 2 & AVF, check the Left Leg (LL) electrode as it is part of both lead II and AVF configurations.

Step-by-step explanation:

If you observe interference on leads 2 & AVF, the sensor/electrode you would check is B) Left Leg (LL). The reason for this is because lead II is composed of the RA (right arm) and LL (left leg) electrodes, and lead AVF is a unipolar lead that also looks at the electrical activity from the perspective of the foot (or left leg). Interference or issues with lead II and AVF are indicative of a problem with the LL electrode. By checking the Left Leg (LL) electrode, you can resolve the interference issue and ensure accurate ECG readings.