Final answer:
The V4-lead should be placed in the fifth intercostal space at the midclavicular line on the left side of the chest.
Step-by-step explanation:
In a 12-lead EKG, the V4-lead should be placed in the fifth intercostal space at the midclavicular line on the left side of the chest.
- Identify the fifth intercostal space by counting down from the clavicle, which is the bone that extends horizontally across the upper chest.
- Locate the midclavicular line by finding the midpoint of the clavicle and following it vertically downward.
- Place the V4-lead in the fifth intercostal space at the midclavicular line on the left side of the chest.
By placing the V4-lead in this specific location, the technician can obtain accurate electrical signals from the heart that can help in diagnosing any potential abnormalities.