Where does lead aVF connect?

Lead aVF, or augmented Vector Foot, is one of the limb leads in a 12-lead electrocardiogram. It specifically measures electrical activity in the heart from the perspective of the left foot, which is why it connects to the left leg.

In an ECG, lead aVF looks at the heart's electrical activity perpendicular to the plane of the body, focusing particularly on the inferior surface of the heart. By connecting to the left leg, it allows for the recording of electrical impulses traveling towards that area.

The other extremities, such as the right arm, left arm, and right leg, are part of different leads (such as aVR, aVL, and V1 to V6), each serving to measure the heart's electrical activity from different viewpoints and providing a comprehensive picture of myocardial function.