基底動脈窗狀小孔其實很少見，通常不具臨床意義，但可能會造成陣發性的頭暈。一56歲女性，因反覆頭暈、噁心、嘔吐、畏光、冒冷汗、心悸與劇烈流鼻水達10多年，求診於本院，其換氣過度測試為陽性，純音聽力檢查顯示兩耳有輕度聽力障礙，心電圖、頸部血管超音波及血液學檢查均為正常，但是，眼振電圖、兩耳溫差測試及前庭誘發肌性電位檢查呈現異常。血管磁振造影顯示基底動脈下段有一個窗狀小孔，診斷為基底動脈窗狀小孔，經服用腦循環促進劑及抗血小板劑2週後，頭暈不再發作。繼續服用抗血小板劑已半年，情況依然穩定。
Basilar artery fenestration (BAF) is rare, and is usually insignificant clinically. However, it may lead to episodic dizziness. A 56-year-old female came to our hospital presenting episodes of dizziness, nausea, vomiting, photophobia, cold sweating, palpitation and severe rhinorrhea, which had lasted for over ten years. Hyperventilation test was positive. Pure tone audiometry showed mild bilateral sensori-neural hearing impairment. Although her electrocardiogram, neck duplex ultrasonography, and blood exams were normal, her electronystagmogram, caloric test and vestibular evoked myogenic potential were not. Magnetic resonance angiogram revealed a fenestration in the lower part of basilar artery, suggesting likely BAF. She was prescribed a brain circulatory promoters and anti-platelets. Two weeks later, her dizziness had subsided. She was continued on antiplatelet therapy and at six months her recovery was found to have remained uneventful.
