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缺血性脑梗塞的出血性改变的确切发病率至今还不清楚。在不同的研究中差异很大。小量出血、CT 扫描难以发现。有人报道 CT 扫描的卒中出血发病率约40%。而核磁共振(MRI)对极小量出血的诊断具有高度敏感性。作者对200例年龄在75岁以内的短暂脑缺血(TIA)和发病在48h 内的缺血性卒中患者进行常规头颅 CT 扫描,颅外和经颅多普勒超声检查(TCD),彩色二维超声和24h 动态心电图检查。对 MRI 证实的心原性脑梗塞发病后3周的患者进行前瞻性研究。200例中 CT 扫描证实为幕上心原性脑梗塞41例。诊断标准为:心肌梗塞;同侧颈总动脉或颈内动
The exact incidence of hemorrhagic changes in ischemic cerebral infarction remains unclear. In different studies vary widely. A small amount of bleeding, CT scan difficult to find. It was reported that the incidence of stroke on CT scans was about 40%. Magnetic resonance imaging (MRI) is highly sensitive to the diagnosis of minimal bleeding. The authors performed routine CT scans of extracranial cerebral infarction (TIA) within 200 years of age and ischemic stroke within 48 hours of onset within 75 years of age, extracranial and transcranial Doppler sonography (TCD), color II Dimensional ultrasound and 24h Holter examination. A prospective study of 3-week MRI-confirmed cardiogenic cerebral infarction was performed. CT scan of 200 cases confirmed supratentorial cerebral infarction in 41 cases. Diagnostic criteria: myocardial infarction; ipsilateral common carotid artery or internal carotid artery