Electrocardiographic changes in the differentiation of ischemic and non-ischemic ST elevation.

Pericarditis, takotsubo cardiomyopathy and early repolarization syndrome (ERS) are well-known to mimic ST elevation myocardial infarction (STEMI). We aimed to study whether ECG findings of reciprocal ST depression, PR depression, ST-segment convexity or terminal QRS distortion can discriminate between ST elevation due to ischemia and non-ischemic conditions. Eighty-five patients with STEMI and 94 patients with non-ischemic ST elevation were included.