title: Early haemodynamic changes in the ophthalmic artery, siphon and intracranial arteries after carotid endarterectomy estimated by transcranial Doppler and duplex scanning.
abstract: OBJECTIVE
  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).
  
  
  CONCLUSIONS
  TCD and duplex gives important early information about patency of the ICA and haemodynamic intracranial changes after CE.
authors.affiliation: Department of Neurology, University Hospital, Linköping, Sweden.
authors.forename: V
authors.initials: V
authors.lastname: Zbornikova
authors.forename: L
authors.initials: L
authors.lastname: Skoglund
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001783:Blood Flow Velocity; D001794:Blood Pressure; D016893:Carotid Stenosis / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000601:surgery; D002536:Cerebral Arteries / Q000000981:diagnostic imaging / Q000503:physiopathology*; D002560:Cerebrovascular Circulation; D016894:Endarterectomy, Carotid; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009880:Ophthalmic Artery / Q000000981:diagnostic imaging / Q000503:physiopathology*; D011673:Pulsatile Flow; D018616:Ultrasonography, Doppler, Duplex; D017585:Ultrasonography, Doppler, Transcranial