Abstract: Objective The purpose of this study was to observe and evaluate the feasibility on the earlywarning for stroke in the community populations by using cerebral vascular hemodynamicindexes (CVHI) detection technology.Methods CVHI score, a key indicator of CVHI detection technique, was used in early warningfor stroke by examination of CVHI. This study was a prospective cohort study.Local residentsaged ≥40 and no stroke history were selected by cluster sampling in two communities in Beijing.Questionnaire survey and examination of CVHI were carried out. The incidence of stroke wereregistered during the 2.5 follow-up year. Observing the incidence of stroke and according toCVHI baseline data ,the preliminary conclusions can be drawn. In this period, no interventionmeasure was taken in the cohort. A strict quality control measurement was made to ensure theaccuracy and reliability of the information.Results (1)2910 residents were included in this study on baseline. In a 2.5-year follow-up period,40 stroke events occurred. 1590 patients’ CVHI score were <75, which accounted for 54.64% ofthe cohort. (2)In 40 patients with new stroke, the percentage of ischemic stroke was 90%, andhemorrhagic stroke 10%. 75% of patients with stroke whose CVHI score were <75. (3)50% ofpatients with stroke were over 70 years. In patients over 70 years old, 90% of patients whoseCVHI score were <75.Conclusion The CVHI score decreased with the age increased, and meanwhile the incidence ofstroke increased. The CVHI detection technique was a useful screening tool in early warning forstroke in the community populations.

Key words: Stroke; Forecasting

摘要： 目的 观察评价脑血管血流动力学指标（cerebral vascular hemodynamic indexes，CVHI）检测技术在社区人群中早期预警卒中的可行性。方法 采用前瞻性队列研究方法，选择北京两个社区，以整群抽样的方式抽取40岁以上有当地户籍且无卒中病史的常住居民作为队列人群,进行基线问卷调查、CVHI检测确定CVHI积分以及2.5年卒中发病随访。观察卒中的发病情况,并结合基线时的CVHI积分值进行分析。结果 （1）基线调查2910人，随访2.5年，新发卒中病例40人。其中1590人CVHI积分值＜75分，占检测队列人群的54.64%。（2）40例新发卒中中36例为缺血性卒中（90%），4例为出血性卒中（10%），其中75%的患者CVHI积分值＜75分。（3）70岁以上患者占新发卒中的50%，其中90%CVHI积分值＜75分。结论 随着年龄的增长，CVHI积分值降低，卒中发病率上升。CVHI检测技术可以作为一种早期预警卒中的筛查工具在社区人群中应用。

关键词: 卒中; 预测