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Title: Effect of Carotid Artery Stenting on Ophthalmic Artery Flow Patterns
Authors: Altınbas, Namik K.
Üstüner, Evren
Özcan, Hasan
Bilgic, Sadik
Sancak, Tanzer
Dusunceli, Ebru
Keywords: carotid artery stenosis
color and spectral Doppler sonography
endovascular treatment
ophthalmic artery
ophthalmologic ultrasound
Issue Date: 2014
Publisher: Wiley
Abstract: Objectives The purpose of this study was to assess the effect of carotid artery stenting on ophthalmic artery blood flow using transorbital color and spectral Doppler sonography and review the changes in relation to cerebral hemodynamics. Methods Twenty-eight consecutive patients with severe internal carotid artery stenosis (>= 70%) who were scheduled for carotid stenting were included. Ophthalmic artery Doppler sonography was performed bilaterally before and after stenting. The flow direction, peak systolic velocity (PSV), end-diastolic velocity (EDV), pulsatility index (PI), and resistive index in the ophthalmic artery were recorded. Results Twenty male and 8 female patients with 10 right-sided and 18 left-sided stenoses were studied. The mean overall carotid stenosis ratio +/- SD was 87.3% +/- 9.9%. After stenting in the ophthalmic artery ipsilateral to the stenosis, significant increases in the PSV (-3.87 +/- 48.81 to 46.70 +/- 25.33 cm/s; P <.001), and EDV (-3.02 +/- 16.31 to 11.24 +/- 7.37 cm/s; P <.001) were detected, and the increase in the PI approached significance (1.40 +/- 0.59 to 1.62 +/- 0.52; P =.055). A change in the flow direction from retrograde to antegrade was noted in 11 patients (39%) after stenting, and in 1 patient with no detectable flow, reconstitution of flow was observed. Increases in the PSV and EDV (P =.03 for Delta EDV) were more pronounced in symptomatic patients than asymptomatic patients after stenting. Conclusions Substantially decreased ophthalmic artery velocity and retrograde flow are suggestive of high-grade carotid artery stenosis (greater than or similar to 90%). Stenting improves ophthalmic artery perfusion and positively changes cerebral hemodynamics in high-grade carotid artery stenosis, especially in symptomatic patients, which can be monitored with ophthalmic artery Doppler sonography.
ISSN: 0278-4297
Appears in Collections:Dahili Tıp Bilimleri Bölümü / Department of Internal Medical Sciences
PubMed İndeksli Yayınlar Koleksiyonu / PubMed Indexed Publications Collection
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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