速度向量成像技术分析主动脉应变作为一种新的超声心动图动脉僵硬度测量方法的应用价值。
Usefulness of aortic strain analysis by velocity vector imaging as a new echocardiographic measure of arterial stiffness.
机构信息
The Heart Center of Chonnam National University Hospital, Chonnam National University Research Institute of Medical Sciences, Gwangju, Korea.
出版信息
J Am Soc Echocardiogr. 2009 Dec;22(12):1382-8. doi: 10.1016/j.echo.2009.08.024.
BACKGROUND
The role of velocity vector imaging (VVI) in evaluating arterial stiffness is not well known. We investigated the usefulness of vascular strain analysis by VVI in evaluating arterial stiffness.
METHODS
Heart-femoral and brachial-ankle pulse wave velocities (PWVs) were measured as standard parameters of arterial stiffness. Intima-media thickness (IMT), fractional shortening (FS), fractional area change (FAC) by two-dimensional (2D) and VVI methods, and peak circumferential strain (PS) of the descending thoracic aorta were measured as echocardiographic parameters of arterial stiffness and compared with PWV in 137 patients (53.8 +/- 13.4 years, 71 male).
RESULTS
Heart-femoral PWV was 9.0 +/- 2.4 m/s, and brachial-ankle PWV was 14.1 +/- 3.0 m/s. Aortic IMT was 0.97 +/- 0.23 mm, and FS was 10.0% +/- 4.0%. FAC was 10.9% +/- 5.2% by 2D tracing and 10.3% +/- 5.1% by the VVI method. PS was 5.4% +/- 3.0%. PS showed significant negative correlation with aortic IMT (r = -0.49, P < .01) and PWV (heart-femoral: r = -0.67, brachial-ankle: r = -0.75, P < .01). PS showed significant positive correlation with FS (r = 0.80, P < .01) and FAC (2D tracing: r = 0.86, VVI: r = 0.88, P < .01). Aortic IMT showed significant positive correlation with PWV (heart-femoral: r = 0.44, brachial-ankle: r = 0.60, P < .01) and negative correlation with FS (r = -0.61, P < .01) and FAC (2D tracing: r = -0.51, VVI: r = - 0.51, P < .01). FS showed significant negative correlation with PWV (heart-femoral: r = -0.54, brachial-ankle: r = -0.72, P < .01). FAC showed significant negative correlation with heart-femoral (2D method: r = -0.61, VVI: r = -0.62, P < .01) and brachial-ankle (2D tracing: r = -0.71, VVI: r = -0.73, P < .01) PWV.
CONCLUSION
PS and FAC measured by VVI were significantly associated with parameters of arterial stiffness and thus can be used as new echocardiographic parameters of arterial stiffness.
背景
速度向量成像（VVI）在评估动脉僵硬度中的作用尚不清楚。我们研究了 VVI 对血管应变分析在评估动脉僵硬度中的作用。
方法
测量心-股和肱-踝脉搏波速度（PWV）作为动脉僵硬度的标准参数。内膜中层厚度（IMT）、二维（2D）和 VVI 方法的分数缩短（FS）、分数面积变化（FAC）以及降主动脉周向峰值应变（PS）作为动脉僵硬度的超声心动图参数，并与 137 例患者（53.8±13.4 岁，71 名男性）的 PWV 进行比较。
结果
心-股 PWV 为 9.0±2.4m/s，肱-踝 PWV 为 14.1±3.0m/s。主动脉 IMT 为 0.97±0.23mm，FS 为 10.0%±4.0%。2D 轨迹的 FAC 为 10.9%±5.2%，VVI 方法的 FAC 为 10.3%±5.1%。PS 为 5.4%±3.0%。PS 与主动脉 IMT 呈显著负相关（r=-0.49，P<.01）和 PWV（心-股：r=-0.67，肱-踝：r=-0.75，P<.01）。PS 与 FS 呈显著正相关（r=0.80，P<.01）和 FAC（2D 轨迹：r=0.86，VVI：r=0.88，P<.01）。主动脉 IMT 与 PWV（心-股：r=0.44，肱-踝：r=0.60，P<.01）呈显著正相关，与 FS（r=-0.61，P<.01）和 FAC（2D 轨迹：r=-0.51，VVI：r=-0.51，P<.01）呈显著负相关。FS 与 PWV（心-股：r=-0.54，肱-踝：r=-0.72，P<.01）呈显著负相关。FAC 与心-股（2D 方法：r=-0.61，VVI：r=-0.62，P<.01）和肱-踝（2D 轨迹：r=-0.71，VVI：r=-0.73，P<.01）PWV 呈显著负相关。
结论
VVI 测量的 PS 和 FAC 与动脉僵硬度参数显著相关，因此可作为新的动脉僵硬度超声心动图参数。
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