Which EKG lead is often used for detecting abnormalities in the right side of the heart?

Lead V1 is positioned over the right side of the heart, specifically in the fourth intercostal space at the right sternal border. This strategic placement makes it particularly sensitive to detecting abnormalities associated with the right atrium and right ventricle. When analyzing an electrocardiogram, deviations in the electrical activity recorded by Lead V1 can indicate issues such as right hypertrophy, atrial enlargement, and other right-sided cardiac conditions.

In contrast, other leads have different focal points: Lead II primarily monitors the inferior aspects of the heart; Lead aVR focuses on the high right side; and Lead V5 is positioned laterally, which is better suited for assessing the left side of the heart. Therefore, Lead V1's direct alignment with anatomical structures on the right side of the heart and its capability to reveal relevant abnormalities make it the best choice for monitoring potential right-sided heart issues.