Janda R
Kliniki Neurologicznej Centralnego Szpitala Klinicznego Wojskowej Akademii Medycznej w Warszawie.
Neurol Neurochir Pol. 1999 Mar-Apr;33(2):291-9.
The correlation was studied between blood flow velocity in the anterior part of the circulus arteriosus and the condition of the internal carotid arteriess in their extracranial course studied by Doppler USG. The arteries in the anterior part of the circulus were studied in 100 patients with ischemic stroke, and in 50 controls without cerebrovascular disease. Only strokes in the area of the middle cerebral artery (MSC) were considered. The patients were divided into 4 subgroups depending on the condition of the extracranial portion of the carotid internal arteries (ICA): 1. with normal pattern of arteries in USG-duplex, 2. with narrowing without haemodynamic importance, 3. with high-grade stenosis and haemodynamic disturbances, 4. with occlusion of the ICA. Transcranial Doppler USG was carried out through a "temporal window" assessing blood flow velocity in the MCA and in the anterior cerebral arteries (ACA) on both sides.
In subgroups 1 and 2 the mean flow velocity in MCA was reduced on the side of the stroke. In groups 3 and 4, apart from reduced flow velocity in the MCA on the side of the stroke, increased velocity on both sides was found in the ACAs.
The degree of ICA narrowing in its extracranial part was influencing the condition of intracranial circulation.
通过多普勒超声研究了动脉环前部的血流速度与颈内动脉颅外段状况之间的相关性。对100例缺血性中风患者和50例无脑血管疾病的对照者的动脉环前部动脉进行了研究。仅考虑大脑中动脉（MCA）区域的中风。根据颈内动脉（ICA）颅外部分的状况将患者分为4个亚组：1. 超声双功检查显示动脉形态正常；2. 有狭窄但无血流动力学意义；3. 有高度狭窄和血流动力学障碍；4. ICA闭塞。通过“颞窗”进行经颅多普勒超声检查，评估双侧MCA和大脑前动脉（ACA）的血流速度。
在亚组1和2中，中风侧MCA的平均血流速度降低。在亚组3和4中，除了中风侧MCA的血流速度降低外，两侧ACA的血流速度均升高。
ICA颅外部分的狭窄程度影响颅内循环状况。
