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Iris arteriovenous communication: clinical and angiographic features
M B Parodi1, E Bondel, S Saviano
1Eye Clinic, University of Trieste, Italy.
International Ophthalmology
|March 25, 1999
Summary
Iris arteriovenous communication (IAVC) is a rare congenital anomaly. Indocyanine green videoangiography (IICGV) better visualizes IAVC and associated iris hypoperfusion compared to iris fluorescein angiography (IFA).
Area of Science:
- Ophthalmology
- Vascular Anomalies
- Diagnostic Imaging
Background:
- Iris arteriovenous communication (IAVC) is a rare congenital vascular anomaly.
- IAVC involves abnormal connections bypassing the iris capillary bed.
Purpose of the Study:
- To describe the clinical and angiographic patterns of IAVC.
- To compare iris fluorescein angiography (IFA) and indocyanine green videoangiography (IICGV) in visualizing IAVC.
Main Methods:
- Eight patients with IAVC were followed for a mean of 33.5 months.
- Ophthalmological examinations included IFA and IICGV.
Main Results:
- IFA detected IAVC vascular structures with rapid filling.
- IICGV provided a more precise view of the IAVC vascular pattern and revealed iris hypoperfusion.
- One patient developed neovascular tufts after cataract surgery in a hypoperfused area.
Conclusions:
- IAVC clinical presentation remained stable during follow-up.
- Both IFA and IICGV delineate IAVC vascular patterns effectively.
- IICGV is superior for identifying surrounding iris hypoperfusion; caution is advised for IAVC patients undergoing cataract surgery.