What EKG changes are often associated with pericarditis?

In pericarditis, the hallmark electrocardiogram changes include diffuse ST segment elevation across multiple leads. This elevation is typically concave in shape and occurs in all leads except V1 and aVR, reflecting the widespread nature of the inflammation of the pericardium. The ST segment changes manifest throughout the ECG tracing, making them distinct from changes seen in conditions like myocardial ischemia, where ST segment elevation is usually localized to certain leads depending on the infarcted area.

Additionally, as pericarditis progresses, you may also observe the development of a pathologic Q wave or T wave inversions after the initial elevation phase, but the primary and most significant change at the onset remains the diffuse ST segment elevation. This characteristic finding helps in distinguishing pericarditis from other acute chest conditions, enabling timely and appropriate management.