title: Hemodynamic response to intravitreal triamcinolone in eyes with macular edema: intravitreal triamcinolone and ocular blood flow.
abstract: OBJECTIVE
  To assess ocular hemodynamic response to intravitreal triamcinolone in patients with macular edema due to diabetes or retinal vein occlusion.
  
  
  METHODS
  Forty-three patients that were injected by intravitreal triamcinolone acetonide (0.1 cc 4 mg) for unilateral macular edema due to diabetes mellitus (n = 17) and occlusion of retinal vein (n = 26) underwent ocular hemodynamic evaluation by color Doppler imaging (CDI) before and one, two and three months after injection. Non-injected fellow eyes as well as 16 healthy volunteers were also evaluated.
  
  
  RESULTS
  In patients with diabetic macular edema, there was no hemodynamic difference between eyes to be injected and non-injected at baseline (P > 0.23). Compared to controls, a significant difference existed in the ophthalmic artery resistant index (P = 0.001) and end-diastolic velocity (P < 0.001) in diabetics. At one month, compared to fellow eyes, change in end diastolic velocity from baseline in treated eyes was significantly decreased in posterior ciliary arteries (0.68 +/- 0.34 cm/s [mean +/- SEM] vs. -1.04 +/- 0.81 cm/s, P = 0.012). Throughout the study period, no significant alteration from baseline in the resistant index of any artery was noted in treated diabetic eyes (P > 0.05). In eyes with retinal vein occlusion, baseline CDI evaluation demonstrated reduced posterior ciliary arteries systolic flow velocity compared to fellow and control eyes (13.24 +/- 1.04 cm/s, 16.37 +/- 0.76 cm/s and 14.33 +/- 1.41 cm/s, respectively, P = 0.007). Increased peak systolic velocity in the posterior ciliary arteries at one week (P = 0.02), one month (P = 0.005) and two months (P = 0.04), and increase in central retinal artery resistant index at one month was noted (P = 0.05).
  
  
  CONCLUSIONS
  Intravitreal triamcinolone temporarily changed central retinal artery blood flow and posterior ciliary arteries' peak systolic blood velocity in eyes with retinal vein occlusion whilst no response of blood flow to triamcinolone injection but only transiently altered end diastolic blood velocity in posterior ciliary arteries was observed in diabetic eyes.
authors.affiliation: Department of Ophthalmology, Süleyman Demirel University Medical School, Isparta, Turkey. ocekic@hotmail.com
authors.forename: Osman
authors.initials: O
authors.lastname: Cekiç
authors.forename: Yavuz
authors.initials: Y
authors.lastname: Bardak
authors.forename: Sahin U
authors.initials: SU
authors.lastname: Tiğ
authors.forename: Aykut
authors.initials: A
authors.lastname: Demirkol
authors.forename: Mustafa M
authors.initials: MM
authors.lastname: Ekim
authors.forename: Onem
authors.initials: O
authors.lastname: Altintaş
authors.forename: Ahmet
authors.initials: A
authors.lastname: Yeşildağ
authors.forename: Orhan
authors.initials: O
authors.lastname: Oyar
mesh_terms: D000368:Aged; D001783:Blood Flow Velocity / Q000187:drug effects*; D003930:Diabetic Retinopathy / Q000188:drug therapy* / Q000503:physiopathology; D003971:Diastole; D005123:Eye / Q000098:blood supply*; D005260:Female; D005938:Glucocorticoids / Q000008:administration & dosage* / Q000627:therapeutic use; D006801:Humans; D007267:Injections; D008269:Macular Edema / Q000188:drug therapy* / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D009880:Ophthalmic Artery / Q000503:physiopathology; D011446:Prospective Studies; D012170:Retinal Vein Occlusion / Q000188:drug therapy / Q000503:physiopathology; D014222:Triamcinolone Acetonide / Q000008:administration & dosage* / Q000627:therapeutic use; D014655:Vascular Resistance / Q000187:drug effects*; D014822:Vitreous Body
chemical_list: D005938:Glucocorticoids; D014222:Triamcinolone Acetonide