In 85cases of VD occurred after cerebral stroke, there were 31 cases of DD genotype (36. 47%), 41 cases of DI genotype (48. 24%), 13 cases of II genotype(15. 29%),and the frequency of D and I alleles was 60. 59% and 39. 41% respectively.

• 85例脑卒中后的VD患者，DD基因型31例(36.；47%25)，DI基因型41例(48