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  • Title: Early haemodynamic changes in the ophthalmic artery, siphon and intracranial arteries after carotid endarterectomy estimated by transcranial Doppler and duplex scanning.
    Author: Zbornikova V, Skoglund L.
    Journal: Eur J Vasc Endovasc Surg; 1998 Jan; 15(1):67-77. PubMed ID: 9519003.
    Abstract:
    OBJECTIVES: To study early haemodynamic changes in connection with carotid endarterectomy (CE). METHODS: Sixty-three consecutive patients, average age 64, with symptomatic stenosis in the internal carotid artery (ICA) > or = 70% were examined clinically and by transcranial Doppler (TCD) 1 day before and within 48 h after CE. Duplex scanning of extracranial vessels was performed within 1 week after CE. RESULTS: After CE, all retrograde systolic velocities (SV) in the ophthalmic artery (OA) and 9/10 retrograde mean velocities (MV) in the siphon changed to antegrade. Antegrade SV in the OA increased significantly (p < 0.001) only on the operated side. SV in the OA on the operated side correlated (p < 0.05) with MV in the siphon, and pulsatility index (PI) in the middle cerebral artery (MCA, p < 0.001). MV in the MCA increased from 46 +/- 12 cm/s to 59 +/- 21 cm/s after CE and in the ACA with normal flow from 54 +/- 19 cm/s to 62 +/- 28 cm/s (p < 0.001 and < 0.05, respectively) only on the operated side. Stump pressure correlated (p < 0.01) with SV in the OA and PI in the MCA and was higher (59 +/- 16 mmHg, p < 0.01) in the group with antegrade flow in the OA compared to the group with retrograde flow in the OA (43 +/- 15 mmHg). CONCLUSION: TCD and duplex gives important early information about patency of the ICA and haemodynamic intracranial changes after CE.
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