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Titolo:
A longitudinal study of collateral flow patterns in the circle of willis and the ophthalmic artery in patients with a symptomatic internal carotid artery occlusion
Autore:
Rutgers, DR; Klijn, CJM; Kappelle, LJ; van Huffelen, AC; van der Grond, J;
Indirizzi:
Univ Utrecht, Med Ctr, Dept Radiol, NL-3584 CX Utrecht, Netherlands Univ Utrecht Utrecht Netherlands NL-3584 CX 3584 CX Utrecht, Netherlands Univ Utrecht, Med Ctr, Dept Neurol, NL-3584 CX Utrecht, Netherlands Univ Utrecht Utrecht Netherlands NL-3584 CX 3584 CX Utrecht, Netherlands Univ Utrecht, Med Ctr, Dept Clin Neurophysiol, NL-3584 CX Utrecht, Netherlands Univ Utrecht Utrecht Netherlands NL-3584 CX 3584 CX Utrecht, Netherlands
Titolo Testata:
STROKE
fascicolo: 8, volume: 31, anno: 2000,
pagine: 1913 - 1920
SICI:
0039-2499(200008)31:8<1913:ALSOCF>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
TRANSCRANIAL DOPPLER SONOGRAPHY; MAGNETIC-RESONANCE ANGIOGRAPHY; CONTRAST MR-ANGIOGRAPHY; BLOOD-FLOW; CEREBROVASCULAR REACTIVITY; CEREBRAL HEMODYNAMICS; VASOMOTOR REACTIVITY; DISEASE;
Keywords:
carotid artery occlusion; collateral circulation; follow-up studies;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Life Sciences
Citazioni:
29
Recensione:
Indirizzi per estratti:
Indirizzo: Rutgers, DR Univ Utrecht, Med Ctr, Dept Radiol, E01 132,Heidelberglaan 100, NL-3584 CXUtrecht, Netherlands Univ Utrecht E01 132,Heidelberglaan 100 Utrecht Netherlands NL-3584 CX
Citazione:
D.R. Rutgers et al., "A longitudinal study of collateral flow patterns in the circle of willis and the ophthalmic artery in patients with a symptomatic internal carotid artery occlusion", STROKE, 31(8), 2000, pp. 1913-1920

Abstract

Background and Purpose-The purpose of the present study was to assess whether the direction of flow via the circle of Willis and the ophthalmic artery (OphA) changed over time in patients with a symptomatic occlusion of the internal carotid artery (ICA) who did not experience recurrent cerebral ischemic symptoms. Methods-Sixty-two patients with a symptomatic ICA occlusion were investigated within 6 months after symptoms occurred. The investigations were repeated after 6 and 12 months. The directions of flow in the Al segment and the posterior communicating artery (PCoA), both on the side of the symptomatic ICA occlusion, were assessed with the use of magnetic resonance angiography. The pattern of collateral flow via the circle of Willis was categorized as via the Al segment only, via the PCoA only, via the Al segment plus the PCoA, or no collateral flow via the circle of Willis. The direction of flow in the OphA was investigated with transcranial Doppler sonography. CO2 reactivity was determined with transcranial Doppler sonography to investigate whether changes in flow patterns were accompanied by changes in cerebrovascular reactivity. Results-There were no statistically significant changes over time in the direction of blood flow in the Al segment and the PCoA or in the pattern of collateral flow via the circle of Willis. On average, 72% of patients with a unilateral ICA occlusion (n=41) had willisian collateral flow compared with 37% of patients with a bilateral ICA occlusion (n=21; P<0.05). Patients with a unilateral ICA occlusion tended to a lower prevalence of reversed flow via the OphA over time. CO2 reactivity did not change significantly in any patient group. In patients with a unilateral ICA occlusion, decreased CO2 reactivity was associated with a higher prevalence of absent willisian collateral flow and a lower prevalence of collateral flow via the Al segment plus the PCoA. Conclusions-The absence of recurrent cerebral ischemic symptoms in patients with a symptomatic ICA occlusion is not associated with an improvement incollateral flow via the circle of Willis or the OphA during 1.5-year follow-up.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/07/20 alle ore 07:18:01