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Stagnation thrombosis: an iris fluorescein angiography study
Summary
Central retinal venous thrombosis can involve arterial supply, showing distinct leakage patterns on iris angiography. This suggests stagnation thrombosis may be a unique clinical entity compared to typical venous thrombosis.
Area of Science:
- Ophthalmology
- Vascular Medicine
- Medical Imaging
Background:
- Central retinal vein thrombosis (CRVT) is a common retinal vascular disease.
- Understanding the specific vascular involvement and diagnostic markers is crucial for patient outcomes.
- Iris angiography provides insights into vascular leakage in retinal conditions.
Purpose of the Study:
- To describe two cases of CRVT with arterial supply involvement.
- To compare iris angiographic findings in CRVT with central retinal artery occlusion (CRAO).
- To differentiate stagnation thrombosis from typical CRVT.
Main Methods:
- Case study of two patients with CRVT and arterial involvement.
- Iris fluorescein angiography in 48 CRVT cases and 19 CRAO cases.
- Comparative analysis of vascular leakage patterns.
Main Results:
- Massive dye leakage into the anterior chamber observed in CRVT cases with arterial involvement.
- Pupillary and extrapupillary vessel leakage in CRVT (recent and long-standing).
- Extrapupillary leakage exclusively in recent CRAO cases.
Conclusions:
- Stagnation thrombosis exhibits an exaggerated arterial response, distinct from typical CRVT.
- Iris angiography reveals differing leakage patterns between venous and arterial occlusive events.
- CRVT with arterial involvement may represent a separate clinical entity.