[Igor73]

Kyuhyun Wang. ST-Segment Elevation in Conditions Other Than Acute Myocardial Infarction. NEJM 2003.
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Figure 1. Electrocardiograms Showing Normal ST-Segment Elevation and Normal Variants. Tracing 1 shows normal ST-segment elevation. Approximately 90 percent of healthy young men have ST-segment elevation of 1 to 3 mm in one or more precordial leads. The ST segment is concave. Tracing 2 shows the early-repolarization pattern, with a notch at the J point in V4. The ST segment is concave, and the T waves are relatively tall. Tracing 3 shows a normal variant that is characterized by terminal T-wave inversion. The QT interval tends to be short, and the ST segment is coved.