前瞻性研究了经头部CT确诊的急性脑梗塞病人于病后3周时行头MRI检查的出血性脑梗塞的情况。结果26例病人中12例(46.2％)有出血性改变,其中皮质型2例,血肿型4例,梗塞灶内渗血6例。大面积梗塞及心源性栓塞较易发生出血。脑血栓形成患者39.1％(9/23)有梗塞后出血。出血后只有1例有临床症状加重。 A prospective study of patients with acute cerebral infarction diagnosed by head CT performed hemorrhagic cerebral infarction at the 3-week post-illness MRI examination. Results Twelve of 26 patients (46.2%) had hemorrhagic changes, of which 2 were cortical type, 4 were hematoma type, and 6 were infarct type. Large infarcts and cardiogenic embolism more prone to bleeding. Cerebral thrombosis occurred in 39.1% of patients (9/23) with post-infarction bleeding. Only one case of bleeding aggravated clinical symptoms.