What change on the EKG is associated with pericarditis?

The characteristic change on the EKG associated with pericarditis is diffuse ST segment elevations across multiple leads. This finding occurs due to inflammation of the pericardium, which can affect the heart's electrical activity. In pericarditis, the ST segment elevations are usually concave in shape and can be seen in multiple contiguous leads, reflecting the widespread nature of the inflammatory process surrounding the heart.

In addition to ST segment elevations, the EKG may also show PR segment depression, but the distinctive feature is the diffuse nature of the ST elevations. This contrasts with other conditions that may cause localized ST changes or other EKG abnormalities, making the widespread ST elevation a key indicator of pericarditis. Understanding this pattern is crucial for diagnosing the condition and distinguishing it from other causes of ST segment elevation, such as myocardial infarction.