In order to evaluate the incidence and prognostic significance of anterior precordial ST segment depression (decreases ST) in acute inferior myocardial infarction (MI), 158 patients with inferior MI were selected. In 90 patients (56.9%) an anterior decreases ST was associated with inferior lesion wave (group A), and in 68 patients (43.1%) only an ecg pattern of inferior myocardial infarction (group B) was present. No significant statistical differences were observed in mortality (group A 10% vs group B 10.2%), in compliances (group A 54.4% vs group B 47.0%) and in higher peak serum ck-levels (group A 83.3% vs group B 69.1%) in two groups during hospitalization period. In conclusion the anterior decreases ST during inferior MI should not be considered a negative prognostic sign. These favourable results are probably related to stringent criteria for ecg diagnosis of inferior myocardial infarction used and to exclusion of all patients with non contemporary evolution of anterior decreases ST and inferior lesion wave.
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