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DOI: 10.1055/s-0028-1109291
© Georg Thieme Verlag KG Stuttgart · New York
Rigidity of Retinal Vessels in Patients with Multiple Sclerosis
Rigidität der Netzhautgefäße bei Patienten mit Multipler SklerosePublication History
received: 23.9.2008
accepted: 20.11.2008
Publication Date:
21 April 2009 (online)

Zusammenfassung
Hintergrund: Analyse der okulären Pulswellenausbreitung ermöglicht eine Abschätzung der Gefäßwandrigidität bei Patienten mit Multipler Sklerose. Methoden: 20 Patienten mit Multipler Sklerose und 20 Kontrollprobanden wurden mit dem RVA-Gerät (Retinal Vessel Analyzer) untersucht. Dazu wurde die peripapilläre Nervenfasernschichtdicke (NFSD) mittels der okulären Kohärenz-Tomografie gemessen. Die Phasenverschiebung zwischen arterieller und venöser Pulsation wurde in 3 Orten gemessen: in unmittelbarer Papillennähe, 1 – 2 Papillendurchmesser sowie 3 – 4 Papillendurchmesser davon entfernt. Unter der Annahme, dass sich die retinalen Venolen in der Kontraphase der choroidalen Zirkulation befinden, wurde die choroidoretinale Pulsationsverzögerung ermittelt. Ergebnisse: CRPV (Chorioidea-Retina-Pulsationsverzögerung) an proximalen, mittleren sowie distalen Messorten betrug bei Augen mit Optikusneuritis in der Anamnese (ON-Augen) 0,26 ± 0,11, 0,27 ± 0,13 and 0,34 ± 0,15 s; bei Augen der MS-Patienten ohne Optikusneuritis-Anamnese (non-ON Augen) entsprechend 0,27 ± 0,14, 0,29 ± 0,11 and 0,30 ± 0,15 s; und bei gesunden Probanden jeweils 0,32 ± 0,19, 0,38 ± 0,16 und 0,45 ± 0,20 s. Die Pulsationsverzögerungszeit war bei Kontrollaugen signifikant länger als sowohl bei ON-Augen (p = 0,012) als auch bei non-ON Augen (p = 0,004), was mit einer schnelleren Pulswellenausbreitung bei MS-Patienten vereinbar ist. Die interokuläre Differenz der durchschnittlichen CRPV zeigte eine signifikante Korrelation mit der durchschnittlichen NFSD bei MS-Patienten (Pearson r = 0,54, p = 0,015; Spearman R = 0,66, p = 0,0016). Schlussfolgerung: Patienten mit MS weisen steifere retinale Gefäße auf. Die Seitendifferenz dieses Parameters zeigte eine signifikante Korrelation mit der Seitendifferenz in Nervenfasernschichtdicke.
Abstract
Purpose: The aim of this study was to analyze pulse wave propagation in the ocular circulation by assessing the phase delay between retinal arterioles and venules and calculating the pulse delay between the retinal and choroidal circulations in MS patients and in control subjects. Subjects and Methods: Twenty patients with multiple sclerosis (38.3 ± 6.2 years) and twenty healthy subjects (37.4 ± 15.2 years) were examined with the Retinal Vessel Analyzer. In addition, an average peripapillary RNFL (retinal nerve fiber layer) thickness was measured by means of ocular coherence tomography in MS patients. The phase delay between the arteriole and venule pulsations was assessed at three sites: in the close retinal vicinity of the disc, 1 – 2 disc diameters and 3 – 4 disc diameters away from the disc. Assuming that venules are counterphased to the choroidal circulation, a choroid-to-retina pulse delay was calculated. Results: The choroid-to-retina pulse delay was 0.26 ± 0.11, 0.27 ± 0.13 and 0.34 ± 0.15 sec in eyes with history of optic neuritis (ON-eyes); in eyes of MS patients without such a history (non-ON eyes) the corresponding values were 0.27 ± 0.14, 0.29 ± 0.11 and 0.30 ± 0.15 sec, and in control eyes 0.32 ± 0.19, 0.38 ± 0.16 and 0.45 ± 0.20 sec, respectively, at three sites centrifugal from the disc. The choroid-to-retina pulse delay was significantly longer in healthy control eyes than both in ON eyes (p = 0.012) and non-ON eyes of MS patients (p = 0.004). The interocular difference of the choroid-to-retina pulse delay and OCT RNFL thickness showed a significant correlation in MS patients (Pearson r = 0.54, p = 0.015; Spearman R = 0.66, p = 0.0016). Conclusion: Patients with multiple sclerosis seem to demonstrate an increased rigidity of the retinal vessels. The interocular difference in retinal vessel rigidity was significantly correlated with the interocular difference in RNFL thickness in MS patients.
Schlüsselwörter
multiple Sklerose - Netzhautgefäße - Gefäßrigidität - Pulswellenpropagation
Key words
multiple sclerosis - retinal vessels - vessel rigidity - pulse propagation
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Konstantin Gugleta, MD
University Eye Clinic Basel
Mittlerestr. 91
4031 Basel
Switzerland
Phone: ++ 41/61/2 65 87 56
Fax: ++ 41/61/2 65 86 52
Email: gugletak@uhbs.ch