The effect of intravitreal bevacizumab (Avastin) injection on retinal blood flow velocity in patients with choroidal neovascularization.

Abstract:

PURPOSE:To study the short-term effects of intravitreal bevacizumab (Avastin) on retinal blood flow velocity and compare them to clinical outcomes assessed by optical coherence tomography (OCT) and tests of visual acuity. METHODS:The Retinal Function Imager (RFI) was used noninvasively and quantitatively to measure retinal blood flow velocity. Eight patients receiving intravitreal injection of Avastin for choroidal neovascularization (CNV) were included in this study. All were imaged by the RFI preinjection and 1 and 7 days postinjection. Visual acuity (VA) and OCT were recorded preinjection and 1 month postinjection. Comparisons were performed using paired Student t test and correlation using Spearman rank test. RESULTS:A good correlation was found between the 1-month change in VA and OCT measurements and the short-term change induced in blood flow velocity. Arterial and venous velocity changes 1 day after the injection correlated with the VA change (p<0.05). The 1-day arterial velocity changes correlated with total macular volume (p=0.02) and venous velocity changes correlated to central macular thickness (p = 0.04). CONCLUSIONS:The RFI provides a noninvasive technique to assess early hemodynamic responses to intravitreal injection of Avastin. These early changes may prove important for better understanding of the mechanism underlying this treatment and serve as a quantitative marker for treatment optimization.

journal_name

Eur J Ophthalmol

authors

Barak A,Burgansky-Eliash Z,Barash H,Nelson DA,Grinvald A,Loewenstein A

doi

10.5301/ejo.5000074

subject

Has Abstract

pub_date

2012-05-01 00:00:00

pages

423-30

issue

3

eissn

1120-6721

issn

1724-6016

pii

FD90786C-B252-471E-B989-6EF42F435A45

journal_volume

22

pub_type

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