A new measurement of pulse wave velocity by wave intensity analysis
10.3760/cma.j.issn.1004-4477.2012.06.005
- VernacularTitle:波强法测定脉搏波传导速度的临床应用价值
- Author:
Yong YANG
;
Jie LIU
;
Tiesheng CAO
;
Yunyou DUAN
;
Zhen WANG
;
Yilin YANG
;
Lei XU
;
Lianbi ZHAO
- Publication Type:Journal Article
- Keywords:
Echocardiography;
Arterial stiffness;
Arterial elasticity;
Pulse wave velocity
- From:
Chinese Journal of Ultrasonography
2012;21(6):474-477
- CountryChina
- Language:Chinese
-
Abstract:
ObjectiveTo test the reproducibility of wave intensity (WI)analysis derived measurements of pulse wave velocity (PWV),and to compare it with the traditional method-applanation tonometry.MethodsOne hundred and ten outpatient volunteers were enrolled in the study.The R-W1 of right brachial artery and right posterior tibial artery were measured through WI in diagnostic ultrasound equipment (Aloka α10),and were used to calculate the right brachial artery PWV which were also measured by tonometry (VP-1000) simutaneously;thus 30 of these volunteers were randomly selected to repeat the above examinations in the same session.Differences between the two methods were investigated by means of a paired t-test,and their linear correlations were also analyzed.Bland-Altman method was used to analyze the agreement between the two methods and their intraobserver intrasession variabilities.ResultsMean baPWVs determined by WI and tonometry were (13.03 ± 1.93) m/s and ( 12.05 ± 2.02) m/s,respectively (P ＜0.001),and the mean of their difference was (0.98 ± 1.1)m/s giving 95 ％ limits of agreement of ( - 1.18 m/s,3.14 m/s).Values of PWV obtained by the two systems were highly correlated( r =0.85,P＜ 0.001 ),with their intraobserver intrasession variabilities being 8.2％ and 7.0％,respectively.ConclusionsWI provides a new noninvasive and convenient method to measure PWV with good agreement and similar reproducibility to the standard tonometry system.
