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目的探讨50岁以上中老年患者椎动脉纤细与后循环缺血性头晕发生的相关性。方法总结506例我院收治的50岁以上患者的椎动脉彩色超声检查结果,对双侧椎动脉的直径、血流量资料及是否有头晕史进行分析。椎动脉直径<2.5 mm被判断为椎动脉纤细。结果在全部患者中,两侧椎动脉的直径和血流速度无统计学差异。19例患者左侧椎动脉直径<2.5 mm,43例患者右侧椎动脉直径<2.5 mm,19例患者双侧椎动脉直径<2.5 mm。椎动脉直径纤细患者其椎动脉血流量显著低于椎动脉直径正常患者。单侧椎动脉直径<2.5 mm组及双侧椎动脉直径<2.5 mm组头晕发生率显著高于椎动脉直径≥2.5 mm组(P<0.01)。结论 506例患者中单侧或双侧椎动脉纤细者占少数,双侧椎动脉纤细者后循环缺血性头晕发生率显著升高。
Objective To investigate the correlation between the stenosis of vertebral artery and ischemic dizziness of posterior circulation in middle-aged and elderly patients over 50 years old. Methods The results of color ultrasound examination of vertebral artery in 506 patients admitted to our hospital over 50 years of age were analyzed. The diameter and blood flow of bilateral vertebral artery and the history of dizziness were analyzed. Vertebral artery diameter <2.5 mm was judged as vertebral artery slender. Results In all patients, the diameter of vertebral artery and the velocity of blood flow on both sides were not statistically different. The diameter of the left vertebral artery was less than 2.5 mm in 19 patients, the diameter of the right vertebral artery was less than 2.5 mm in 43 patients and the diameter of bilateral vertebral artery was less than 2.5 mm in 19 patients. Vertebral artery diameter slender patients with vertebral artery blood flow was significantly lower than the diameter of normal vertebral artery patients. The incidence of dizziness in patients with unilateral vertebral artery diameter <2.5 mm and bilateral vertebral artery diameter <2.5 mm was significantly higher than those with vertebral artery diameter ≥ 2.5 mm (P <0.01). Conclusions 506 cases of unilateral or bilateral vertebral artery stenosis accounted for a small number of bilateral vertebral artery stenosis posterior circulation ischemic dizziness incidence was significantly higher.