Classification of Ophthalmic Artery Flow in Patients with Occlusive Carotid Artery Disease
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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