Vascular resistance in primary open angle glaucoma
| Autor: | V. J. Marmion, M. I. Aldoori, R. N. Baird |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
Continuous wave doppler
medicine.medical_specialty Central retinal artery genetic structures Open angle glaucoma business.industry Glaucoma Hemodynamics medicine.disease eye diseases Ophthalmology medicine.anatomical_structure medicine.artery Vascular resistance Medicine sense organs business Optic disc Diastolic flow |
| Zdroj: | Acta Ophthalmologica Scandinavica. 76:668-670 |
| ISSN: | 1395-3907 |
| DOI: | 10.1034/j.1600-0420.1998.760606.x |
| Popis: | PURPOSE To explore any difference in vascular resistance between normal and glaucoma subjects using a continuous wave Doppler technique. METHOD The Resistance Index, RI, was calculated in two orbital vessels of 20 glaucoma patients all of whom had pressures over 23 mmHg and 15 age matched normal subjects. The haemodynamic relationship between the supratrochlear and a vessel at the optic disc, presumed central retinal artery, is expressed as RIST/RICRA. RESULTS In 30 normal eyes the ratio was >1 m, in 10 glaucoma patients it was >1. In those glaucoma eyes which were 1. The remaining 16 eyes which showed no change in the ratio were the eyes with moderate to severe field loss. CONCLUSION An altered, increased, peripheral vascular resistance with reduced diastolic flow in small orbital vessels has been demonstrated in glaucoma subjects. This was not altered by treatment in the more severely affected eyes. |
| Databáze: | OpenAIRE |
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