Amaurosis fugax causes
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor-In-Chief: Marcelo R. Zacarkim, M.D. [2]
Overview
Amaurosis fugax is a symptom of carotid artery disease. It occurs when a piece of plaque in a carotid artery breaks off and travels to the retinal artery in the eye. The carotid arteries provide the main blood supply to the brain. They are located on each side of the neck under the jaw.Plaque is a hard substance that forms when fat, cholesterol, and other substances build up in the walls of arteries. Pieces of plaque can block blood flow. In people with amaurosis fugax, vision loss continues as long as the blood supply to the retinal artery is blocked. Atherosclerosis of the arteries in the neck is the main risk factor for this condition. Risk factors for atherosclerosis include heart disease, high cholesterol, smoking, diabetes, and high blood pressure.
Causes in Alphabetical Order
- Acute hypovolemia
- Atherosclerotic occlusive disease]]
- [[Blood coagulability
- Cardiac emboli (valve, mural thrombi, intracardiac tumor)
- Carotid bifurcation thromboembolism
- Carotid narrowing
- Central retinal artery occlusion
- Chiasm compression
- Decreased blood flow (ischemia) to the retina
- Distal internal carotid artery atheroembolism
- Drug abuse-related (intravascular emboli)
- Extracranial arterial occlusive disease
- [[Focal cerebral ischemia (transient ischemic attack (TIAs)]]
- Hollenhorst plaques
- Hypoperfusion (from cardiac failure)
- Ipsilateral carotid disease
- Local emboli (ipsilateral internal carotid artery)
- Malignant arterial hypertension
- Migraine aura
- Retinal artery thrombosis
- [[Retinal emboli
- Retinal migraine
- Systemic diseases disturbing blood viscosity or coagulability
- Tingling (or numbness in hands or feet)
- Unexplained weight loss
- Very dry skin