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Ophthalmic artery microembolism in giant cell arteritis
B Schäuble1, C A Wijman, B Koleini
1Department of Neurology, Boston University School of Medicine, Boston VA Medical Center, Massachusetts 02130, USA.
Summary
Giant cell arteritis can cause microembolism, leading to vision loss. Transcranial Doppler ultrasonography can detect these microembolic signals in ophthalmic arteries, aiding diagnosis of vascular eye disorders.
Area of Science:
- Neurology
- Ophthalmology
- Vascular Medicine
Background:
- Giant cell arteritis (GCA) is a systemic vasculitis that can affect cranial arteries.
- Ocular complications, such as anterior ischemic optic neuropathy, are a major cause of vision loss in GCA.
Observation:
- A 70-year-old man with GCA presented with headache and sudden vision loss.
- Funduscopic examination revealed signs consistent with anterior ischemic optic neuropathy.
- Elevated Westergren sedimentation rate (66 mm/h) and positive temporal artery biopsy confirmed GCA.
Findings:
- Transcranial Doppler (TCD) with microembolus detection identified signals in the left ophthalmic artery.
- Subsequent monitoring revealed microembolic signals in bilateral anterior and middle cerebral arteries.
- This demonstrates that microembolism occurs in GCA and can be detected in vivo.
Implications:
- Ophthalmic artery microembolism detection using TCD is a novel diagnostic capability.
- This technique may improve the evaluation of patients with vascular eye conditions.
- In vivo detection of microemboli offers potential for earlier intervention in GCA patients.