Question

If you see interference on leads 1 And AVR, which sensor electrode would you check?

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

Answer 1

If interference is observed on leads 1 and AVR, the sensor electrode to check is the Left Leg (LL).

Step-by-step explanation:

If you see interference on leads 1 And AVR, you would check the Left Leg (LL) sensor electrode. The depolarization vector represents the wave of depolarization spreading from the top of the heart. In leads I, II, and III, each pair of electrodes measures a component of the depolarization vector and is graphed in an ECG. Since leads 1 and AVR are showing interference, the problem likely lies with the electrode connected to the LL.