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[The Italian Group for the Study of Streptokinase in Myocardial Infarct: Echocardiographic study].

Seventeen of the centres participating to the G.I.S.S.I. trial performed also, before discharge from the Hospital, an echocardiographic examination of patients (pts) included in the study. 561 pts were included, 280 assigned to the streptokinase (SK) treatment, and 281 to the control (CT) group. The echocardiographic asynergic area score index was lower in the SK pts than in the CT group (p less than 0.01). The difference was more evident in pts treated within 6 hours from the onset of symptoms (p less than 0.005), in pts without previous infarct (p less than 0.005), and in pts aged over 65 (p less than 0.005). The end diastolic (EDV) and the end-systolic (ESV) volumes were lower in SK pts (p less than 0.01 and p less than 0.025 respectively) than in the CT group; the ejection fraction (EF) did not differ. The reduction of EDV and ESV was more evident in pts treated within 6 hours, in pts without previous infarct, in pts aged over 65, and in anterior infarcts. At the 6-month follow-up examination, in SK pts the asynergic area score index, the EDV, the ESV and the EF were unmodified; in CT pts, on the contrary, the EDV and the ESV were significantly increased (p less than 0.05 and p less than 0.025 respectively).