What differentiates Non-ST Elevation Myocardial Infarction (NSTEMI) from STEMI?

To differentiate Non-ST Elevation Myocardial Infarction (NSTEMI) from ST Elevation Myocardial Infarction (STEMI), the most critical feature is the absence of significant ST segment elevation on the electrocardiogram (EKG).

In STEMI, there is a characteristic elevation of the ST segment due to complete occlusion of a coronary artery, which results in a more severe types of heart damage. In contrast, NSTEMI typically presents with ST segment depression or T wave inversions but does not show that significant elevation. This distinction in EKG findings is crucial for diagnosis and helps to guide immediate treatment decisions.

Understanding this difference is vital in the clinical setting as it influences management strategies, risk assessment, and prognostic implications for patients experiencing acute coronary syndromes.