Which part of the heart does the limb lead aVF correspond to?

The limb lead aVF corresponds to the left leg, which plays a crucial role in determining electrical activity directed toward this part of the body during an electrocardiogram (ECG). The aVF lead specifically measures the electrical potential difference between the left leg and a reference point created by the right arm and left arm leads. This positioning allows it to capture the heart's electrical activity as it moves toward the inferior part of the body.

This positioning is essential for creating a complete picture of the heart's electrical function, especially in terms of observing the heart's orientation and any potential abnormalities in the inferior portion of the heart. Understanding the contribution of each limb lead, including aVF, enhances the analysis and interpretation of the overall ECG.