Amaurosis Fugax

Transient visual loss

Amaurosis fugax is a harbinger of an imminent stroke.

Amaurosis fugax is a result of an occlusion or stenosis of the internal carotid artery circulation.

Risk factors for amaurosis fugax include:

  • Diabetes
  • Heart disease
  • Smoking
  • Hypertension
  • Hyperlipidemia
  • Advanced age
  • Use of cocaine

Amaurosis fugax -Mechanism:

  • Thromboembolism from a carotid plaque
  • Hypoperfusion
  • Vasospasm
  • Elevated plasma viscosity, for example with leukemia, multiple myeloma
  • Atherosclerotic cerebrovascular disease

Hollenhorst plaque

Retinal examination shows cholesterol plaque lodged within a retinal vessel called Hollenhorst plaque.

Investigations

Carotid Doppler- assess the extracranial and intracranial status of the vessels.

Magnetic resonance angiography – Internal carotid artery evaluation

Computed tomography angiography – evaluate the patency of the internal carotid arteries.

ECG and Holter monitoring – To recognize arrhythmia and Source of emboli

Transesophageal echocardiography -should be obtained to rule out any possible source of rhythmic disturbance or cardiac emboli.

Newsletter Signup

100% FREE ! Subscribe to our newsletter For Updates and New Publications in Medicine Question Bank.

Subscribe to our weekly newsletter below and never miss the latest Information. 

Medicine Questions, MCQs ,Viva questions, Image questions

100% FREE