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通过定量测绘急性心肌梗塞患者静脉滴注国产尿激酶后即刻及３、８及２４小时不同时间的Ｓ－Ｔ段平方面积，以找出溶栓药物应用后的最大作用时间。结果表明用药后即刻Ｓ－Ｔ段平方面积无变化；用药后３小时由原来１３２±６５ｍｍ２下降为５７±２３ｍｍ２（Ｐ＜０．００１，下降程度＞５０％）；用药后８小时下降为５０．５±２４ｍｍ２；用药后２４小时下降为４７±２０ｍｍ２。提示用药后３小时是发挥最大溶栓效应的时间段，８小时及２４小时，溶栓效果继续发挥作用，保持了狭窄血管的通畅。
By quantitative mapping of acute myocardial infarction in patients with intravenous infusion of urokinase immediately and 3, 8 and 24 hours at different times S-T square area, to find out the maximum effect of thrombolytic drug application time. The results showed that there was no change in square area of S-T segment immediately after treatment; from 132 ± 65mm2 to 57 ± 23mm2 (P <0.001, a decrease of more than 50%) 3 hours after administration; 5 ± 24mm2; decreased to 47 ± 20mm2 24 hours after treatment. Prompted 3 hours after treatment is the maximum time to play the role of thrombolytic effect, 8 hours and 24 hours, thrombolytic effect continues to play a role in maintaining the smooth stenosis of blood vessels.