既往没有卒中病史 ,神经系统检查没有定位体征 ,而同时在头ＣＴ或头ＭＲＩ检查中发现脑实质内有梗死灶的存在。这种无症状脑梗死 (ｓｉｌｅｎｔｂｒａｉｎｉｎｆａｒｃｔｉｏｎ)对于以后首次脑卒中发病的短期和长期结局的影响 ,目前还不清楚。无症状脑梗死可能与一些特殊的危险 In the past, there was no history of stroke, no signs of neurological examination, and presence of an infarct in the brain parenchyma at the head CT or head MRI. The impact of silentbraininfarction on the short-term and long-term outcomes of subsequent first stroke is not yet clear. Asymptomatic cerebral infarction may be associated with some special risks