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Representative ECG changes. Typical pattern of transient T-wave flattening and inversion with QRS amplitude changes A, on admission, B, midpoint, C, discharge, and D, follow-up in same patient. ST-segment elevation in 2 children E, lateral ST-segment elevation with chest pain because of subendocardial myocardial infarction in the territory supplied by left anterior descending and circumflex arteries. F, Pericarditis pattern of ST-segment elevation with concave ST-segment elevation.
