How can you differentiate between V1 and V6 placements in the ECG?

The correct answer is centered around the specific anatomical locations of the V1 and V6 leads in the electrocardiogram (ECG) lead placement system. V1 is positioned in the fourth intercostal space at the right sternal border. This location is essential for capturing the electrical activity of the heart, particularly from areas such as the right ventricle and the interventricular septum.

On the other hand, V6 is placed at the left midaxillary line, typically in the same horizontal plane as V4. This position is crucial for assessing the electrical activity from the left side of the heart, particularly the left ventricle.

Understanding these placements helps in accurately interpreting the heart's electrical activity during an ECG. Proper placement of these leads is critical for obtaining a clear and comprehensive view of the heart’s electrical signals.