Which chest lead placement is at the 5th intercostal space between V4 and V6?

• A. V6 placement
• B. V4 placement
• C. V5 placement
• D. V3 placement

Answer: (C)

Think of the chest leads across the left side as a row at the same height—the 5th intercostal space. V4 sits at the 5th intercostal space along the midclavicular line, V5 is moved outward to the left anterior axillary line at the same level, and V6 sits further out at the left midaxillary line. So the position that lies at the 5th intercostal space between V4 and V6 is the one at the left anterior axillary line, known as V5.