RESUMO
Objective To investigate the influence of microbleeds on the onset and development of different types of stroke. Methods According to stroke subtypes, 163 patients were classified into lacunar infarction (n= 56), transient iscbemia attach (n=31), atherothrombotic infarction (n=37), intracerebral hemorrhage (n=39), and control groups (n=43). Suaceptibility-weighted imaging , T1WI, T2WI and diffusion-weighted imaging were performed with 3.0 T system to observe cerebral microbleed and infarction. Results The incidence and the number of micrehleeds were significantly greater in patients with intracerebral hemorrhage (75.6% and 14.5±11.6, re-spectively),then lacunar infarction and therothrombetic infarction atherothrombotic infarction [(55.3% and 8.1± 3.4), (37.8% and 4.5±2.6)] and the incidence and the number of microhleeds in above groups are higher than transient ischemia attach (9.7% and 0.3±0.1), and controls (9.3% and 0.2±0.1) (P<0.01). There was a correlation between the number of microbleeds and the severity of lacunar infarction, aslo a correlation between the number of microbleeds and the number of intracerebral hemorrahages (r=0.402, P<0.001). Conclusion Microb-leeds are closely associated with stroke, which may indicate more advanced microangiopathy and higher risk of bleeding.