Which lead is placed at the 5th intercostal space and anterior axillary line?

The lead that is positioned at the 5th intercostal space and anterior axillary line is V5. This particular lead is part of the precordial leads used in an electrocardiogram (ECG) to monitor the heart's electrical activity.

To place lead V5, the technician locates the 5th intercostal space, which is found below the 5th rib, and then moves to the anterior axillary line, a vertical line that runs down from the front of the armpit. This positioning allows V5 to capture electrical activity from the lateral wall of the left ventricle, providing valuable information about the heart's function.

Understanding the placement of each lead is crucial for accurate interpretation of ECG results, as specific leads are designated to monitor different areas of the heart, thereby aiding in diagnosing various cardiac conditions.