Where are the lead wires RA and RL located?

The lead wires RA (Right Arm) and RL (Right Leg) are part of the electrical system used to measure the heart's electrical activity, typically in the context of an electrocardiogram (ECG or EKG).

The correct answer identifies the RA lead, which is attached to the right arm, and the RL lead, which is attached to the right leg. This positioning is crucial for the accurate representation of the heart's electrical signals. The RA lead is typically placed at the wrist or near the shoulder, while the RL lead is positioned on the right ankle or the lower leg region.

Having this specific placement allows for the proper grounding and reference point needed for the heart's electrical activity to be measured correctly, which is essential for diagnosing various cardiac conditions. The RA and RL leads help in creating a baseline in the electrocardiogram, ensuring that the readings of the other leads can be interpreted accurately.