What are the names of the limb leads in a standard ECG?

The limb leads in a standard ECG are designated as Lead I, Lead II, Lead III, aVR (augmented Vector Right), aVL (augmented Vector Left), and aVF (augmented Vector Foot). Each of these leads is essential for providing a different view of the heart's electrical activity, allowing healthcare providers to evaluate various aspects of cardiac performance.

Lead I measures the potential difference between the right arm (negative) and the left arm (positive). Lead II records the electrical activity from the right arm to the left leg, and Lead III captures the signal from the left arm to the left leg. The augmented leads (aVR, aVL, aVF) provide additional perspectives by enhancing the signals recorded from the standard limb positions, further improving the assessment of cardiac function.

This particular set of leads is fundamental to understanding a patient's heart rhythm and can be critical in diagnosing various cardiac conditions. The other options do not correspond to the recognized naming convention for the limb leads in a standard ECG.