Classification of Ophthalmic Artery Flow in Patients with Occlusive Carotid Artery Disease
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To investigate and classify the ophthalmic artery (OA) flow patterns in patients with occlusive carotid artery disease (OCAD).
Forty-three patients (52 eyes) with documented OCAD of ≧70% underwent orbital color Doppler imaging. The eyes were first divided into four groups by peak systolic velocity in OA (PSVOA): group A, PSVOA ≦ 0; group B, 0 < PSVOA ≦ 10; group C, 10 < PSVOA ≦ 40; and group D, PSVOA > 40 cm/s, then further classified by the shape of the OA flow wave. The groups were then compared with respect to the collateral pathway (Co-Path), severity of the OCAD, and systemic diseases.
Eyes with unidirectional reverse flow (group A1) had a Co-Path from the ipsilateral external carotid artery and 70%–100% OCAD. Eyes with bidirectional reverse flow (group A2) had no Co-Path, 75% OCAD, and impending ischemic heart disease (IHD). Group B eyes had dome-shaped OA flow waves with no Co-Path and 99%–88% OCAD. Group C1 eyes, with normal flow waves, had a Co-Path from the contralateral internal carotid artery and 100% OCAD. Group C2 eyes, with triangular-shaped flow waves, had no Co-Path, 93%–70% OCAD, and IHD. Group D eyes had normal high flow waves with no Co-Path, 75% OCAD, and hypertension.
The OA flow patterns were variously affected by collateral pathway, severity of OCAD, and systemic diseases. Jpn J Ophthalmol 2006;50:224–228 © Japanese Ophthalmological Society 2006
Key wordsblood flow wave occlusive carotid artery disease ophthalmic artery orbital color Doppler imaging peak systolic velocity
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