American journal of ophthalmology · 2006
The effect of timolol-dorzolamide and timolol-pilocarpine combinations on ocular blood flow in patients with glaucoma.
СтатьяРандомизированное исследованиеПоддержка исследования: вне правительства СШАНазвание и аннотация: Перевод пока не подготовлен
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Uva Maurizio G, Longo Antonio, Reibaldi Michele, Reibaldi Alfredo
Аннотация
PURPOSE: To investigate the effect of timolol-dorzolamide and timolol-pilocarpine fixed combinations on retrobulbar vessel blood flow.
DESIGN: Prospective, randomized, masked, crossover clinical trial.
METHODS: Sixteen patients with primary open angle glaucoma, treated with timolol 0.5%, received timolol 0.5%-dorzolamide 2% and timolol 0.5%-pilocarpine 2% for four weeks each. Heart rate, blood pressure, intraocular pressure (IOP), and peak systolic (PSV) and end diastolic velocities (EDV) in ophthalmic, central retinal, and short posterior ciliary arteries were measured before and after each treatment, and resistivity index was calculated.
RESULTS: The IOP was reduced (P < .01) by timolol-dorzolamide and, more effectively, timolol-pilocarpine combinations. In central retinal artery, the end diastolic velocity was increased by the timolol-dorzolamide combination (P < .01), resulting in higher end diastolic velocity and lower resistivity index values (both P < .01) compared with the timolol-pilocarpine combination.
CONCLUSIONS: The timolol-dorzolamide combination increases the end diastolic velocity in central retinal artery, despite a lower intraocular pressure decrease, suggesting an effect on retinal circulation.
DESIGN: Prospective, randomized, masked, crossover clinical trial.
METHODS: Sixteen patients with primary open angle glaucoma, treated with timolol 0.5%, received timolol 0.5%-dorzolamide 2% and timolol 0.5%-pilocarpine 2% for four weeks each. Heart rate, blood pressure, intraocular pressure (IOP), and peak systolic (PSV) and end diastolic velocities (EDV) in ophthalmic, central retinal, and short posterior ciliary arteries were measured before and after each treatment, and resistivity index was calculated.
RESULTS: The IOP was reduced (P < .01) by timolol-dorzolamide and, more effectively, timolol-pilocarpine combinations. In central retinal artery, the end diastolic velocity was increased by the timolol-dorzolamide combination (P < .01), resulting in higher end diastolic velocity and lower resistivity index values (both P < .01) compared with the timolol-pilocarpine combination.
CONCLUSIONS: The timolol-dorzolamide combination increases the end diastolic velocity in central retinal artery, despite a lower intraocular pressure decrease, suggesting an effect on retinal circulation.
Предметные рубрики MeSH
AgedAntihypertensive AgentsBlood Flow VelocityBlood PressureCiliary ArteriesCross-Over StudiesDrug Therapy, CombinationGlaucoma, Open-AngleHeart RateHumansIntraocular PressureMiddle AgedOphthalmic ArteryPilocarpineProspective StudiesRegional Blood FlowRetinal ArterySulfonamidesThiophenesTimololUltrasonography, Doppler, Color