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  1. Central retinal artery occlusion following haemorrhage
    Vijendran M, Suppiah K
    Med J Malaysia, 1977 Sep;32(1):37-40.
    PMID: 609341
    Matched MeSH terms: Arterial Occlusive Diseases/etiology*
  2. Fulltext Ophthalmic artery occlusion following neuro-embolization of the external carotid artery, a case report
    Loon NW, Gendeh BS, Zakaria R, Hamzah JC, Din NM
    BMC Ophthalmol, 2017 Jun 15;17(1):92.
    PMID: 28619056 DOI: 10.1186/s12886-017-0490-7
    BACKGROUND: Embozene® is a new neuroembolizing microsphere used to reduce intraoperative bleeding for head and neck tumours. We report a case of iatrogenic ophthalmic artery occlusion after Embozene® embolization of the external carotid artery (ECA).

    CASE PRESENTATION: A 22-year-old African gentleman presented with left nasal obstruction and epistaxis for 2 years and was diagnosed with nasopharyngeal carcinoma. He subsequently underwent embolization of the maxillary branch of the left ECA using Embozene® Microspheres - 250 μm in size before endoscopic tumour excision to reduce intra-operative bleeding. He complained of sudden painless profound visual loss in the left eye (LE) two hours after embolization. Visual acuity in LE was no light perception. Fundus examination showed pale retina with no cherry red spot. Arterial narrowing and segmentation were seen in all quadrants. A diagnosis of left ophthalmic artery occlusion was made. Despite immediate management including ocular massage and lowering of intraocular pressure, the visual loss remained. Retrospective review of digital subtraction angiogram showed an anastomosis between the left ophthalmic artery and anterior deep temporal artery as a potential route for microspheres migration.

    CONCLUSION: Pre-operative angio-architecture understanding and diligent selection of embolic material are helpful in preventing this adverse event. The use of newer agents for embolotherapy may cause migration of embolic material from the external to the internal carotid system leading to ophthalmic artery occlusion and blindness.

    Matched MeSH terms: Arterial Occlusive Diseases/etiology*
  3. Fulltext COVID-19 and Major Organ Thromboembolism: Manifestations in Neurovascular and Cardiovascular Systems
    Pillai P, Joseph JP, Fadzillah NHM, Mahmod M
    J Stroke Cerebrovasc Dis, 2021 Jan;30(1):105427.
    PMID: 33137615 DOI: 10.1016/j.jstrokecerebrovasdis.2020.105427
    COVID-19, caused by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), has been shown to cause multisystemic damage. We undertook a systematic literature review and comprehensive analysis of a total of 55 articles on arterial and venous thromboembolism in COVID-19 and articles on previous pandemics with respect to thromboembolism and compared the similarities and differences between them. The presence of thrombosis in multiple organ systems points to thromboembolism being an integral component in the pathogenesis of this disease. Thromboembolism is likely to be the main player in the morbidity and mortality of COVID -19 in which the pulmonary system is most severely affected. We also hypothesize that D-dimer values could be used as an early marker for prognostication of disease as it has been seen to be raised even in the pre-symptomatic stage. This further strengthens the notion that thromboembolism prevention is necessary. We also examined literature on the neurovascular and cardiovascular systems, as the manifestation of thromboembolic phenomenon in these two systems varied, suggesting different pathophysiology of damage. Further research into the role of thromboembolism in COVID-19 is important to advance the understanding of the virus, its effects and to tailor treatment accordingly to prevent further casualties from this pandemic.
    Matched MeSH terms: Arterial Occlusive Diseases/etiology*
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