健康人颈总动脉波强度曲线特点

摘要

目的 探讨不同年龄和性别健康志愿者颈总动脉波强度(wave intensity,WI)参数特点,为临床提供参考.方法 健康志愿者525例.应用Aloka Prosound α10测量双侧颈总动脉的WI曲线参数,包括2个正向波(W1和W2)、1个负向波面积(NA)和两个时间指标[心电图R波顶点至W1顶点(R-W1)和W1顶点至W2顶点(W1-W2)].所有受检者按年龄分6个组.比较WI各参数在不同年龄和性别间的差异.结果 ①共检测525例健康志愿者1050支颈总动脉,W1为(8332±4796)mmHg·m-1·s-3,W2为(1853±1143)mmHg·m-1·s-3,NA为(38±26)mmHg·m-1·s-2,R-W1为(102±19)ms,W1-W2为(266±42)ms;②W1、NA均与年龄呈负相关(r=-0.204和r=-0.301,P＜0.001),且＜20岁组和20～29岁组W1和NA与其他组比较.差异均有统计学意义(P＜0.05或P＜0.001),但其他组间差异无统计学意义.③男女双侧颈总动脉W1和W1-W2比较差异均有统计学意义,右侧颈总动脉NA比较差异有统计学意义,其他各项参数比较差异无统计学意义;④双侧颈总动脉WI各参数比较差异均无统计学意义.结论 WI技术是评价心脏与动脉系统相互作用有价值的方法.%Objective To summarize the characteristics of common carotid arterial wave intensity (WI) in healthy volunteers and offer the normal reference values of WI. Methods Common carotid arteries (CCA) in 525 healthy volunteers were examined using Aloka Prosound α10 equipped with wave intensity software. The volunteers were divided into six group according to age,group A,＜20 years old;group B,20 - 29 years old;group C,30 - 39 years old;group D,40 - 49 years old;group E,50 - 59 years old and group F,≥60 years old. Carotid arterial wave intensity in normal subjects had two positive peaks, the first peak,W1 ,and the second peak, W2. Between the two positive peaks, a negative area (NA), the time interval between the R-wave of ECG and the first peak(R-W1 ) and that between the first and second peaks (W1-W2) were observed. Results ① 1050 common carotid arteries in 525 volunteers were studied. The mean values of W1,W2,NA,R-W1,and W1-W2 were (8332±4796) mmHg · m-1 · s-3,(1853±1143)mmHg · m-1 · s-3,(38 ± 26) mmHg · m-1 · s-2, (102 ± 19)ms and (266 ± 42)ms,respectively. ②These values were no significant between the left and right CCA in same group. W1 and NA were correlated with age ( r = - 0. 204 and r = -0.301, P ＜0. 001). W1 and NA in group A and B were significant increased than those in other groups( P ＜0. 05 or P ＜0. 001 ). ③There were statistical significances in W1 and W1-W2 of CCA between male and female. ④There were no statistical significances in all values in common carotid arteries of both sides (P ＞0. 05). Conclusions WI technique is useful for evaluating the dynamic behavior of the heart and the vascular system and their interaction. W1 is very sensitive to the changes in the working condition of the cardiovascular system.