Effect of carotid endarterectomy on the ophthalmic artery |
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Authors: | Kawaguchi S Sakaki T Uranishi R Ida Y |
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Institution: | (1) Department of Neurosurgery, Nara Medical University, Nara, Japan, JP |
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Abstract: | Summary.
Summary.
Background: To evaluate the effect of carotid endarterectomy on ophthalmic artery flow direction and peak systolic flow velocity, the
authors examined the ophthalmic artery on 32 patients who had undergone carotid endarterectomy.
Methods: The 32 patients had more than 70% stenosis of the internal carotid artery at its origin on angiography. The ophthalmic artery
ipsilateral to the carotid endarterectomy was evaluated by the ophthalmic artery color Doppler flow imaging before surgery
and then at one week, one month, and three months after surgery.
Findings: (1) Before carotid endarterectomy: eight patients showed reversed ophthalmic artery direction. In the other 24 patients with
antegrade ophthalmic artery flow direction, the average peak systolic flow velocity was 0.17±0.10 m/sec. (2) At one week after
carotid endarterectomy: The reversed ophthalmic artery flow direction was resolved in each patient. The average peak systolic
flow velocity in the patients with preoperative antegrade flow rose significantly to 0.28±0.10 m/sec (p<0.05). (3) At one month and three months after carotid endarterectomy: All patients showed the antegrade ophthalmic artery
flow direction. The average peak systolic flow velocities showed no significant change compared to the value at one week after
carotid endarterectomy. (4) During the followed up period, there was no patient showing worsening or recurrence of clinical
symptoms including the visual symptoms.
Interpretation: Carotid endarterectomy brought about the correction of the reversed flow and an increase in the peak systolic flow velocity
of the ipsilateral ophthalmic artery immediately after surgery. |
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Keywords: | : Carotid endarterectomy color Doppler imaging ophthalmic artery |
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