Where is the correct placement for lead V4 in an ECG?

The correct placement for lead V4 in an ECG is at the 5th intercostal space at the midclavicular line. This specific location is crucial for accurately monitoring the heart's electrical activity from the left side of the chest. The 5th intercostal space is found directly beneath the 5th rib, and the midclavicular line is an imaginary vertical line that runs down from the midpoint of the clavicle.

Positioning lead V4 here allows it to provide optimal information about the anterior wall of the heart, which is essential in diagnosing various cardiac conditions. Proper placement is vital for the effectiveness of the ECG in monitoring heart health, as incorrect placements can lead to misinterpretation of the cardiac signals.