Choroidal haemodynamics in glaucoma.

Choroidal haemodynamics in glaucoma. Research Abstract Details 

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Choroidal haemodynamics in glaucoma. Abstract Text:

AIM: Quantification of haemodynamics of the peripapillary choroid in and the assessment of possible differences between normal subjects (N), ocular hypertensive (OHT), primary open angle (POAG), and normal pressure glaucoma (NPG) patients. METHODS: Video fluorescein angiograms (Rodenstock SLO 101) were made in 22 N subjects, 12 OHT, 48 POAG, and 46 NPG patients. The angiographically derived dye build up curves were described by means of an exponential model. One of the model parameters is the time constant tau theoretically reflecting local blood refreshment time; the blood refreshment time tau is the time needed to replace the blood volume in the choriocapillaris, inversely proportional to the local choroidal blood flow. Other variables are maximal fluorescence (Fdt) and time of first fluorescence (t0). Mean variable values were calculated for disc area and circular areas around the disc. RESULTS: Fdt of the disc was significantly lower in the POAG and NPG patients. There was no statistical difference in t0 between the study groups. The choroidal blood refreshment time was significantly longer in NPG patients and to a lesser extent in the POAG patients compared with the normal controls. The slowest choroidal blood refreshment can be found in the NPG group. The median choroidal blood refreshment times (25th-75th percentile) in the controls, OHT, POAG, and NPG patients were 4.1 (3.7-4.5), 4.4 (3.7-6.4), 5.8 (4.3-6.8), and 7.1 (5.5-9.3) seconds respectively. CONCLUSIONS: With the help of parametrisation of dye curves, using a one compartmental model, choroidal haemodynamics can be quantified. The blood refreshment time of the peripapillary choriocapillaris was found to be significantly prolonged especially in NPG patients; this may indicate slower choroidal haemodynamics in NPG patients.

Choroidal haemodynamics in glaucoma. Publishing Authors By Initials

For similar eye diseases: ocular hypertension research abstracts see: eye diseases: ocular hypertension research

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Choroidal haemodynamics in glaucoma. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: The British journal of ophthalmology

VOLUME: 81

Page Numbers: 735-42

Journal Abbreviation: Br J Ophthalmol

ISSN: 0007-1161

DAY: 28

MONTH: Sep

YEAR: 1997

Choroidal haemodynamics in glaucoma. Information

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LANGUAGE: eng

NlmUniqueID: 421041

Choroidal haemodynamics in glaucoma. Keywords Mesh Terms:

KEYWORDS: Ocular Hypertension

MESH TERMS: physiopathology

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Grant and Affiliation Information for Choroidal haemodynamics in glaucoma.

AFFILIATION: Department of Ophthalmology, Academic Medical Center, University of Amsterdam, Netherlands.

Country: ENGLAND

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MEDLINETA: Br J Ophthalmol

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