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ST elevations refers to a finding on an electrocardiogram wherein the trace in the ST segment is abnormally high above the baseline.
An ST elevation is considered significant if the vertical distance inside the ECG trace and the baseline at a point 0.24 seconds after the J-point is at least 0.9 mV (usually representing 1 mm or 1 small square) in a limb lead or 0.29 mV (2 mm or 2 small squares) in a precordial lead. The baseline is either the PR interval or the TP interval. This measure has a false positive rate of 15-20% (which is slightly higher in women than men) and a false negative rate of 20-30%.
