title: Effects of dorzolamide/timolol fixed combination on retrobulbar hemodynamics in pseudoexfoliative glaucoma.
abstract: In our study we aimed to evaluate the short-term effects of dorzolamide/timolol on ocular perfusion pressure and retrobulbar blood flow in patients with pseudoexfoliative glaucoma (PXG). This prospective observational cross-sectional study enrolled 22 eyes of 22 newly-diagnosed patients with PXG in a single center. All of the patients received a fixed combination of dorzolamide/timolol. Besides routine ophthalmologic examination, the retrobulbar hemodynamic parameters in the ophthalmic artery, central retinal artery, and short posterior ciliary arteries were measured in all participants at baseline and the 3(rd) month using color Doppler imaging. The mean intraocular pressure (IOP) was 22.3 ± 2.1 mmHg at baseline and reduced to 17.4 ± 2.3 mmHg at the 3(rd) month (p < 0.05). None of the retrobulbar parameters, except peak systolic velocity and resistive index in temporal short posterior ciliary arteries, changed significantly on therapy with dorzolamide/timolol fixed combination when the results were analyzed at Month 3. The drug significantly decreased the peak systolic velocity (p = 0.044) and reduced the resistive index in 0.04 units, 95% confidence interval 0.03-0.05, (p < 0.001) in the temporal short posterior ciliary arteries. This study reports that the retrobulbar hemodynamics might be affected less than expected by dorzolamide/timolol fixed combination in patients with PXG although the reduction of IOP was statistically significant.
authors: Department of Ophthalmology, School of Medicine, Istanbul Medipol University, Istanbul, Turkey. Electronic address: drmustafaeliacik@gmail.com.
authors: Mustafa
authors: M
authors: Eliacik
authors: Department of Ophthalmology, School of Medicine, Istanbul Medipol University, Istanbul, Turkey.
authors: Sevil
authors: S
authors: Karaman Erdur
authors: Department of Radiology, Istanbul Medipol University, School of Medicine, Turkey.
authors: Inci
authors: I
authors: Baltepe Altıok
authors: Department of Ophthalmology, School of Medicine, Istanbul Medipol University, Istanbul, Turkey.
authors: Gokhan
authors: G
authors: Gulkilik
authors: Department of Ophthalmology, School of Medicine, Istanbul Medipol University, Istanbul, Turkey.
authors: Cemile Anil
authors: CA
authors: Aslan
authors: Department of Ophthalmology, School of Medicine, Istanbul Medipol University, Istanbul, Turkey.
authors: Faruk
authors: F
authors: Kaya
mesh_terms: D000368:Aged; D002257:Carbonic Anhydrase Inhibitors / Q000008:administration & dosage*; D003430:Cross-Sectional Studies; D004338:Drug Combinations; D017889:Exfoliation Syndrome / Q000188:drug therapy*; D005123:Eye / Q000098:blood supply; D005260:Female; D006439:Hemodynamics / Q000187:drug effects; D006801:Humans; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D012039:Regional Blood Flow; D012161:Retinal Artery / Q000187:drug effects / Q000503:physiopathology; D013449:Sulfonamides / Q000008:administration & dosage*; D013876:Thiophenes / Q000008:administration & dosage*; D013999:Timolol / Q000008:administration & dosage*; D016896:Treatment Outcome
chemical_list: D002257:Carbonic Anhydrase Inhibitors; D004338:Drug Combinations; D013449:Sulfonamides; D013876:Thiophenes; D013999:Timolol; C062765:dorzolamide
keywords: Color Doppler imaging; Dorzolamide/timolol; Glaucoma; Pseudoexfoliation; Retrobulbar ocular blood flow