What EKG finding is typically associated with pericarditis?

Diffuse ST elevations are the hallmark EKG finding associated with pericarditis. In this condition, inflammation of the pericardial sac leads to irritation of the epicardial surface, which manifests on an electrocardiogram as widespread ST segment elevations across multiple leads. These elevations are generally concave in shape and are not limited to specific leads, distinguishing them from the ST elevations seen in myocardial infarction.

In addition to the diffuse ST elevations, pericarditis may also present with PR segment depression, but this finding is not as universally recognized as the primary feature associated with its diagnosis. While flat T waves and Q waves can be seen in other cardiac conditions, they are not characteristic of pericarditis. Flat T waves may suggest previous myocardial ischemia, and Q waves typically indicate prior infarctions or necrosis, which do not align with the acute presentation of pericarditis.

Thus, the prominent and widespread nature of the diffuse ST elevations in multiple leads is the key EKG finding that clinicians look for when diagnosing pericarditis.