Effect of systemic hypertension on foveolar choroidal blood flow in age related macular degeneration.
Br J Ophthalmol
; 90(3): 342-6, 2006 Mar.
Article
en En
| MEDLINE
| ID: mdl-16488959
AIM: To investigate the effect of systemic hypertension (SH) on the foveolar choroidal circulation in patients with age related macular degeneration (AMD). METHODS: This study included 163 study eyes with early AMD characteristics of 124 AMD patients. Study eyes had visual acuity of 20/40 or better, drusen > or =63 microm, and/or RPE hypertrophy. 56 of the AMD patients had a history of SH and 47 of these patients were receiving antihypertensive medications. Laser Doppler flowmetry (Oculix) was used to assess relative choroidal blood velocity (ChBVel), volume (ChBVol), and flow (ChBFlow) in the centre of the fovea of the study eyes. Differences in the mean haemodynamic parameters between groups of eyes were assessed using analysis of variance (ANOVA) and a test of linear trend, with adjustment for the correlation between eyes of the same patient. RESULTS: AMD patients with SH showed decreased ChBFlow in comparison with those without SH (ANOVA, p = 0.02). This association was maintained after adjustments for multiple factors (p = 0.04). CONCLUSIONS: AMD patients with SH have lower ChBFlow than those without SH. This decrease in choroidal blood circulation may help explain the mechanism by which systemic hypertension may contribute to the progression of AMD and the development of choroidal neovascularisation.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Coroides
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Hipertensión
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Degeneración Macular
Tipo de estudio:
Etiology_studies
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Observational_studies
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Prevalence_studies
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Risk_factors_studies
Límite:
Aged
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Aged80
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Female
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Humans
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Male
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Middle aged
Idioma:
En
Revista:
Br J Ophthalmol
Año:
2006
Tipo del documento:
Article
País de afiliación:
Estados Unidos
Pais de publicación:
Reino Unido