The Significance of ST and T Changes for the Development of Coronary Events in Patients with Acute Coronary Chest Pain, Treated in a Coronary Care Unit without Verified Acute Myocardial Infarction

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Abstract
The 1-yr prognosis for patients with a confirmed diagnosis of acute myocardial infarction (AMI) was compared with that of non-AMI patients treated in the coronary care unit (CCU). The 1-yr incidence of coronary events (CE) after discharge from CCU was 37% in the 51 AMI patients and 20% in the 81 non-AMI patients. The 1-yr mortality rate were 27 and 4%, respectively. Among the non-AMI patients, well known risk factors such as hypertension, previous AMI, congestive heart failure, smoking, diabetes and hyperlipemia were not more common in those who developed a CE ST segment depression and T wave inversion, each of at least 0.1 mV, in 3 or more ECG leads were selective criteria for a high-risk group with respect to CE. Preventive measures should be considered in this group of patients without verified AMI.