Arterial blood flow characteristics in central retinal vein occlusion and effects of panretinal photocoagulation treatment: an investigation by colour Doppler imaging

Avunduk, Avni Murat; Dinç, Hasan; Kapicioğlu, Zerrin; Uğurlu, Şeyda; Dayanir, Volkan; Korkmaz, Emine Vasfiye

doi:10.1136/bjo.83.1.50

Cited by 16 publications

(14 citation statements)

References 27 publications

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“…By using CDI in the non-ischemic CRVO cases, Avunduk et al [15] reported that OA and CRA blood flow velocities and RI did not differ significantly from their fellow eyes. Significantly lower blood flow velocities and higher RI were found in the CRA and OA of the patients with non-ischemic CRVO compared with healthy controls [16].…”

Section: Discussionmentioning

confidence: 99%

Hemodynamic response to intravitreal triamcinolone in eyes with macular edema

et al. 2007

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Section: Discussionmentioning

confidence: 99%

Hemodynamic response to intravitreal triamcinolone in eyes with macular edema

et al. 2007

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“…Alterations in arterial and/or venous flow during the course of ischaemic CRVO are well known, but retinal blood flow changes after panretinal photocoagulation treatment are still controversial. Avunduk et al. (1999) reported that with colour Doppler imaging, reduced blood flow velocity in eyes with CRVO with laser treatment decreased even further compared to the contralateral eyes.…”

Section: Discussionmentioning

confidence: 99%

The capillary blood flow in ischaemic type central retinal vein occlusion: the effect of laser photocoagulation

Arvas

Ocakoğlu

Özkan

2002

Acta Ophthalmologica Scandinavica

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ABSTRACT. Purpose: To determine the effect of photocoagulation on retinal blood flow (RBF) in eyes with ischaemic type central retinal vein occlusion (CRVO). Patients and Methods:Retinal blood flow was measured in 12 eyes with CRVO, 12 fellow eyes and 12 eyes of 12 age-matched healthy subjects using the Heidelberg retinal flowmeter (HRF). Microvascular blood flow values (volume, flow, velocity) were recorded from the upper temporal retina and macula. Eyes were re-examined 1 month after photocoagulation. We investigated whether there was a difference in RBF measurements before and after photocoagulation treatment. Results: In eyes with CRVO, mean RBF values (volume, flow and velocity) obtained from the upper temporal retina increased significantly after treatment (paired t-test, p ∞ 0.05). In contrast, mean RBF values from the macula were unaffected by photocoagulation (paired t-test, p Ͼ 0.05). Retinal blood flow values from the upper temporal retina obtained from control subjects were significantly higher than the values in eyes with CRVO before and after photocoagulation (unpaired t-test, p ∞ 0.05), but there was no significant difference between control subjects and CRVO patients in RBF values from the macula (unpaired t-test, p Ͼ 0.05). Mean RBF values were significantly higher in CRVO patients' fellow-eyes before photocoagulation in the eyes with CRVO (paired ttest, p ∞ 0.05) but were lower than in age-matched healthy control eyes (unpaired t-test, p ∞ 0.05). Macular blood flow did not differ between the eyes with CRVO and fellow eyes (paired t-test, p Ͼ 0.05). Conclusion: Laser photocoagulation increased retinal blood flow in eyes with CRVO, but RBF did not reach normal values. Photocoagulation was found to have no effect on RBF in the macular area.

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“…Avunduk et al 23 also investigated the blood flow velocities of the fellow eyes of CRVO patients and reported that those of the ophthalmic and central retinal arteries of the fellow eyes of CRVO patients were decreased compared with those of normal controls. They suggested that some hemodynamic abnormalities in the retrobulbar arterial circulation might be present before the clinical onset of CRVO.…”

Section: Erg In the Fellow Eyementioning

confidence: 95%

“…The authors suggested that reduced rod phototransduction may be secondary to reduced choroidal perfusion. In another study, Avunduk et al 23 reported the blood flow velocities of the ophthalmic and central retinal arteries measured by using color Doppler imaging in cases with CRVO and normal controls. In cases with CRVO, a primary bloodstream decrease in the retrobulbar arterial circulation had already been caused by arteriosclerosis and atherosclerosis, and a secondary bloodstream decrease was caused by developing CRVO with increased vascular resistance through the capillary bed to the arterial side.…”

Section: Erg In the Affected Eye (First Recordings)mentioning

confidence: 97%