上海农村40岁以上人群脑血管血液动力学参数的分布特征

Distributional characteristics of cerebral vascular hemodynamic indexes in a rural area population over 40 years in Shanghai

目的描述农村40岁以上人群的脑血管血液动力学参数的分布特征。方法以整群抽样方法抽取上海农村某社区40岁以上人群,进行脑卒中危险因素调查和血液动力学指标检测,按年龄、性别、左右颈动脉检测部位进行分组,分析和比较各组间血液动力学指标的差异及其整体分布特征。结果 40岁以上人群颈动脉最大(Vmax)、最小(Vmin)、平均(Vmean)血流速度,平均脑血流量(Qmean),舒张压与临界压的差值(Dp)等指标随着年龄的增长而呈现明显的降低趋势;脉搏波波速(Wv)、特性阻抗(Zcv)、外周阻力(Rv)、动态阻力(DR)和临界压(Cp)等指标随着年龄的增长而呈现明显的升高趋势。上述指标左右侧检测部位间和男女性别组间比较有一定差异,但无明显的变化规律。结论脑血管血液动力学检测指标变化与年龄增长密切相关。

Objective To describe the characteristics of cerebral vascular hemodynamic indexes （CVHI） in a rural population over 40 years. Methods Participants over 40 years were selected from a rural area by cluster sampling. General information, common risk factors of stroke were investigated and CVHIs were checked. All participants being enlisted in the study were grouped by age, gender, left and right carotid checking position. Differences of CVHIs between groups were compared and overall distributional characteristics were described. Results CVHIs, such as Vmax, Vmin, Vmean, Qmean and Dp in the population, were decreased along with ageing, while Wv, Zcv, Rv, DR and Cp were increased with ageing. There were differences of the indexes between left or right carotid, as well as male or female, but no obvious trends. Conclusions There is significant relationship between the change of CVHIs and ageing.