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首页> 外文期刊>Neurosurgery >Angeles between A1 and A2 segments of the anterior cerebral artery visualized by three-dimensional computed tomographic angiography and association of anterior communicating artery aneurysms.
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Angeles between A1 and A2 segments of the anterior cerebral artery visualized by three-dimensional computed tomographic angiography and association of anterior communicating artery aneurysms.

机译：通过三维计算机断层血管造影术和前交通动脉瘤的关联可视化前脑动脉A1和A2段之间的安吉利斯。

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OBJECTIVE: The angle of arteries at bifurcations, as well as the blood flow, are factors of hemodynamic stress on the apical region, where aneurysms often develop. Using images obtained with three-dimensional computed tomographic angiography, we sought to determine the angles between the A1 and A2 segments of the anterior cerebral artery of the anterior communicating artery (ACoA) complex associated with aneurysms. These angles cannot be detected by conventional cerebral angiography. METHODS: The course of the anterior cerebral artery was studied using three-dimensional computed tomographic angiography in 42 consecutive patients with ACoA aneurysms. Twenty-one other subjects, randomly chosen from patients without aneurysms, served as controls. Bilateral A1-A2 angles of the contrast-opacified anterior cerebral artery were measured by three-dimensional computed tomographic angiography in patients with normoplastic A1 segments, and the relationship between the angle and the association of aneurysms was analyzed using cerebral angiography. RESULTS: Of the 42 patients with ACoA aneurysms, 19 patients showed hypo- or aplastic A1 segments, as did only 2 of the 21 patients without ACoA aneurysms. The average A1-A2 angle was determined to be 116+/-24 degrees (mean+/-standard deviation) in 18 patients having ACoA complexes with normoplastic A1 segments with aneurysms; 17 patients without aneurysms had A1-A2 angles measuring 143+/-14 degrees (P < 0.0001). The A1-A2 angle associated with ACoA aneurysms was 103+/-20 degrees, which was much smaller than that of the non-aneurysm side in the former group (128+/-20 degrees) (P = 0.0036). CONCLUSION: ACoA aneurysms are associated with the smaller A1-A2 angle junction of the ACoA complex, where higher hemodynamic stress may occur in patients with normoplastic A1 segments.
机译：目的：分叉处的动脉角度以及血流是经常形成动脉瘤的根尖区域血流动力学压力的因素。使用三维计算机断层血管造影获得的图像，我们试图确定与动脉瘤相关的前交通动脉（ACoA）复合体的前脑动脉A1和A2段之间的角度。这些角度不能通过常规的脑血管造影术检测到。方法：使用三维计算机断层血管造影术对42例连续的ACoA动脉瘤患者的大脑前动脉进行了研究。从没有动脉瘤的患者中随机选择的其他二十一名受试者作为对照。用三维计算机断层血管造影术对具有正常增生性A1节段的患者进行造影剂不透明的前脑动脉的双侧A1-A2角测量，并使用脑血管造影分析角度与动脉瘤相关性之间的关系。结果：42例ACoA动脉瘤患者中，有19例显示A1段发育不良或再生障碍，而21例无ACoA动脉瘤的患者中只有2例。在18名患有ACoA复合物和正常性A1节段伴有动脉瘤的患者中，平均A1-A2角确定为116 +/- 24度（平均+/-标准差）。 17名无动脉瘤的患者的A1-A2角度为143 +/- 14度（P <0.0001）。与ACoA动脉瘤相关的A1-A2角为103 +/- 20度，比前一组的非动脉瘤侧（128 +/- 20度）小得多（P = 0.0036）。结论：ACoA动脉瘤与ACoA复合体的较小的A1-A2角交界处相关，在正常的A1节段患者中可能发生较高的血液动力学压力。

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