Spectral analysis of Doppler signal in the prophylaxis of ischemic cerebrovascular accidents in extra- and/or intracranial carotid and vertebral systems.
Spectral analysis of Doppler signal in the prophylaxis of ischemic cerebrovascular accidents in extra- and/or intracranial carotid and vertebral systems.
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多普勒信号的频谱分析用于预防颅外和/或颅内颈动脉和椎体系统的缺血性脑血管事故。
DOI：
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发表时间：
1990
期刊：
影响因子：
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通讯作者：
R. Marian
中科院分区：
文献类型：
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作者：
C. Şipoş;L. Popoviciu;A. Birău;V. Roman;R. Marian
使用多普勒信号连续波频谱分析 (SADS) 和/或脉冲波经颅多普勒超声检查 (TCD-US)，我们检查了 263 名患有颈动脉和椎基底动脉 (V-B) 系统缺血性脑血管疾病 (ICVD) 症状的患者。通过考虑频率谱参数（收缩期峰值速度 - SV；舒张末期速度 - DV）来确定狭窄程度；颈内动脉 (ICA) 和颈总动脉 (CCA) 的 SV 之比； ICA 和 CCA 的 DV 之比以及光谱展宽 (SB) 指数的值。与对照侧相比，CCA 中的 DV 随着 Pourcelot 循环阻力指数 (RP) 和谱展宽指数 (SB) 值的增加而减小，但在颅外 ICA 的显着狭窄中不断观察到 ICA 中的 SV 明显增加（超过 3.5 kHz）。我们的观察指出，当近端 ICA 闭塞缓慢且进行性形成时，ECA（正常情况下循环阻力增加，反映舒张期速度降低）逐渐接管 ICA 的血流动力学特征，表现为 DV 增加，接近 DV 和 ICA。这种情况可能会引起错误的解释。
Using continuous-wave spectral analysis of Doppler signal (SADS) and/or pulsed-wave transcranial Doppler ultrasonography (TCD-US) we examined 263 patients with ischemic cerebrovascular diseases (ICVD) symptoms in the carotid and vertebrobasilar (V-B) systems. The degree of stenosis was established by taking into consideration the parameters of the spectrum of frequency (systolic peak velocity--SV; end-diastolic velocity--DV); the ratio between SV of internal carotid artery (ICA) and common carotid artery (CCA); the ratio between DV of ICA and CCA as well as the value of the spectral broadening (SB) index. The diminution of DV in CCA with increased values of Pourcelot's circulatory resistance index (RP) and spectral broadening index (SB) as compared with the controlateral part, but with apparent increase (over 3.5 kHz) of SV in ICA was constantly observed in significant stenoses of extracranial ICA. Our observations have pointed out that when proximal ICA occlusion is being formed slowly and progressively, ECA (whose increased circulatory resistance under normal conditions reflects diminished diastolic velocities) gradually takes over the hemodynamic characteristics of ICA which is expressed by increased DV, approximating DV and ICA. This situation may give rise to erroneous interpretations.