Parodi M B, Bondel E, Saviano S, Da Pozzo S, Bergamini L, Ravalico G
Eye Clinic, University of Trieste, Italy.
Int Ophthalmol. 1998;22(1):1-5. doi: 10.1023/a:1006054221016.
Iris arteriovenous communication (IAVC) represents a quite rare congenital anomaly, consisting of abnormal vascular connection bypassing the iris capillary bed. The aim of the present study is to describe clinical and angiographic pattern of IAVC on iris fluorescein angiography (IFA) and on indocyanine green videoangiography (IICGV).
During a mean follow-up period of 33.5 months, eight patients affected by IAVC underwent at least three ophthalmological examinations completed by IFA and IICGV.
IFA allows the detection of IAVC vascular structures, evidencing afferent and efferent branches, which show a rapid filling, without any evidence of leakage or iris hypoperfusion. IICGV shows more precisely the entire vascular pattern of IAVC, revealing also the presence of iris hypoperfusion in the sector in which the IAVC lay. One patient underwent cataract surgery; three months later, two neovascular tufts appeared in the hypoperfused area related to IAVC. In all other patients, periodical examinations did not reveal any clinical or angiographic changes.
In IAVC, the clinical picture appears stable throughout the follow-up; both angiographic techniques seem able to precisely delineate the vascular pattern. Nevertheless, IICGV is superior in showing iris hypoperfusion surrounding the vascular abnormality. Particular care must be drawn to patients affected by IAVC who need cataract surgery.
虹膜动静脉交通（IAVC）是一种非常罕见的先天性异常，由绕过虹膜毛细血管床的异常血管连接组成。本研究的目的是描述虹膜荧光血管造影（IFA）和吲哚菁绿视频血管造影（IICGV）上IAVC的临床和血管造影表现。
在平均33.5个月的随访期间，8例IAVC患者至少接受了3次眼科检查，并完成了IFA和IICGV检查。
IFA可检测到IAVC的血管结构，显示出输入和输出分支，其充盈迅速，无渗漏或虹膜灌注不足的迹象。IICGV更精确地显示了IAVC的整个血管模式，还揭示了IAVC所在区域存在虹膜灌注不足。1例患者接受了白内障手术；3个月后，在与IAVC相关的灌注不足区域出现了2个新生血管簇。在所有其他患者中，定期检查未发现任何临床或血管造影变化。
在IAVC中，整个随访期间临床表现似乎稳定；两种血管造影技术似乎都能精确描绘血管模式。然而，IICGV在显示血管异常周围的虹膜灌注不足方面更具优势。对于需要进行白内障手术的IAVC患者必须格外小心。
