[Effect of thrombolytic therapy with intravenous streptokinase on the size of myocardial infarction estimated by the ECG QRS score system].

The impact of short-term intravenous large dose streptokinase injection on the myocardial infarction size estimated by a QRS score system was studied in 57 patients with primary myocardial infarction admitted to hospital at least 6 hours following the onset of the disease. There was a lower myocardial infarction size despite its localization and the time of treatment initiation when thrombolysis was successful, as evidenced by non-invasive criteria. The reliability of the QRS score system used to estimate the myocardial infarction size increased when the patients with anterior or inferior myocardial infarction and those with successful and unsuccessful systemic streptokinase thrombolysis.