title: Iris arteriovenous communication: clinical and angiographic features.
abstract: BACKGROUND
  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).
  
  
  METHODS
  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.
  
  
  RESULTS
  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.
  
  
  CONCLUSIONS
  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.
authors: Eye Clinic, University of Trieste, Italy.
authors: M B
authors: MB
authors: Parodi
authors: E
authors: E
authors: Bondel
authors: S
authors: S
authors: Saviano
authors: S
authors: S
authors: Da Pozzo
authors: L
authors: L
authors: Bergamini
authors: G
authors: G
authors: Ravalico
mesh_terms: D001165:Arteriovenous Malformations / Q000175:diagnosis*; D003937:Diagnosis, Differential; D005260:Female; D005451:Fluorescein Angiography; D005500:Follow-Up Studies; D005654:Fundus Oculi; D006801:Humans; D007208:Indocyanine Green; D007498:Iris / Q000098:blood supply*; D007499:Iris Diseases / Q000151:congenital / Q000175:diagnosis*; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D014741:Video Recording
chemical_list: D007208:Indocyanine Green