Lead V2 is positioned at which location?

• A. Midway between V2 and V4
• B. Fifth intercostal space, midclavicular line
• C. Fourth intercostal space, left of sternum
• D. Anterior axillary line, same level as V4

Answer: (C)

Lead V2 is positioned in the fourth intercostal space, just to the left of the sternum. This placement is crucial in electrocardiography as it allows for accurate monitoring of the heart's electrical activity in the anterior chest wall. The position of V2 helps in assessing the electrical activity of the heart's anterior and septal regions, providing important information regarding potential issues such as ischemia or infarction in these areas.

The fourth intercostal space is an anatomical landmark that ensures consistency in lead placement across different patients, which is essential for reliable comparisons of ECG readings over time. By positioning V2 to the left of the sternum, the lead captures the electrical signals more effectively from the heart's ventricular walls. This positioning is standard practice in routine cardiac evaluation and stress testing, making it an integral part of cardiac assessment protocols.