”Segmental duplication” (SD) of the basilar artery has a reported angiographic prevalence of 0.04% to 0.6%. It is presumed to occur as a result of maldevelopment during the fifth week of the fetal life, and should be differentiated from aortic dissection or embolism. A 72-year-old male presented with episodic positional dizziness for over one year. A magnetic resonance image/angiogram incidentally revealed a 1.74×0.84 mm vascular loop over the basilar artery, which confirmed a SD. We suggest that the SD increased the vascular resistance of the posterior circulation, which then led to transient unstable flow during postural hypotension. Conservative treatment and life-style changes were recommended. Over the following month, the symptom recurred less and less, and then medication was halted. Over the following year, the symptom only recurred at irregular intervals of several weeks or months. Thus it is possible that a simple life-style change may be able to prevent recurrence.
為了持續優化網站功能與使用者體驗,本網站將Cookies分析技術用於網站營運、分析和個人化服務之目的。
若您繼續瀏覽本網站,即表示您同意本網站使用Cookies。