Which lead would best show right atrial enlargement on an EKG?

Right atrial enlargement can be best demonstrated in Lead V1 on an EKG. This lead is positioned to provide an excellent view of the right atrium, as it is located near the right side of the chest. When there is right atrial enlargement, you would typically see specific changes in the P wave morphology recorded in V1.

The P wave may be taller than normal, indicating an increase in the right atrial pressure and size, which can be characterized by a P wave that has a taller amplitude. In Lead V1, this is particularly evident because the electrode is strategically placed close to the right atrium, allowing for a clear representation of electrical activity associated with changes in atrial size.

Consequently, Lead V1 is the optimal choice for assessing right atrial enlargement, making it crucial for clinicians to recognize these changes for accurate diagnosis and management.