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Comparative Study
Journal Article
[Electrocardiographic indices of reperfusion and limitation of the necrotic area in acute myocardial infarct].
The aim of this study was to assess the evolution of ST segment displacement and the formation of new Q waves in relation to the late angiographic demonstration of recanalization of the infarct-related vessel in 36 patients with acute myocardial infarction admitted in our Institution within 8 hours from the onset of symptoms. Eighteen patients were treated with intravenous urokinase (200,000 + 1,200,000 UI) followed by sodium-heparin 1,000 U/ev/hour for 48 hours and calcium-heparin 3,000 UI/10 Kg/12 hours from the third day to discharge. Eighteen patients were treated from admission only with calcium-heparin as seen before. All the patients have been followed with serial electrocardiograms; we evaluated the sum of ST displacements (ST12) and Q waves score (Q12) in the 12 standard leads on admission, and on the twelfth, twenty-fourth, forty-eighth hour, and on discharge. On the basis of the late angiographic findings and apart from the treatment, we divided the patients into 2 groups: patients with recanalization of infarct-related vessel (20 patients, 55.5%) and patients with occlusion of the infarct-related vessel (16 patients, 44.6%). We did not observe statistically significant differences between the 2 groups for decrease of ST segment displacement of formation of new Q waves, even if reperfused patients showed a more rapid and complete decrease of ST segment displacement and a more rapid formation of new Q waves with respect to occluded patients. Our data indicate that from a clinical point of view electrocardiographic indices are not a sensitive marker of recanalization of infarct-related vessel.(ABSTRACT TRUNCATED AT 250 WORDS)
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