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The effect of nifedipine on retinal venous pressure of glaucoma patients with the Flammer-Syndrome

Fang, L. ; Turtschi, S. ; Mozaffarieh, Maneli

In: Graefe's Archive for Clinical and Experimental Ophthalmology, 2015, vol. 253, no. 6, p. 935-939

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    Titel
    • The effect of nifedipine on retinal venous pressure of glaucoma patients with the Flammer-Syndrome
    Autor
    • Fang, L.. Department of Ophthalmology, University of Basel, Mittlere Strasse 91, 4031, Basel, Switzerland
    • Turtschi, S.. Department of Ophthalmology, University of Basel, Mittlere Strasse 91, 4031, Basel, Switzerland
    • Mozaffarieh, Maneli. Department of Ophthalmology, University of Basel, Mittlere Strasse 91, 4031, Basel, Switzerland
    Dokumententyp
    • Postprint
    Sprache
    • Englisch
    Veröffentlicht in
    • Graefe's Archive for Clinical and Experimental Ophthalmology, 2015, vol. 253, no. 6, p. 935-939. Springer Berlin Heidelberg
    Andere elektronische Ausgabe
    OAI-PMH-ID
    • oai:doc.rero.ch:332369
    Summary
    Purpose: The purpose was to measure the retinal venous pressure (RVP) in both eyes of primary open-angle glaucoma (POAG) patients before and 3weeks after treatment with low-dosed Nifedipine. Methods: This retrospective study included 20 POAG patients who were treated with Nifedipine (5mg daily) and 20 untreated control POAG patients. In both the treated and untreated control group, a distinction was made between those patients who had the Flammer-Syndrome (FS) and those who did not. The RVP was measured in all patients bilaterally at baseline and 3weeks later by means of contact lens ophthalmodynamometry and the RVP measurements of the treated POAG patients were compared to the RVPs of the untreated POAG controls. Ophthalmodynamometry is done by applying an increasing force on the eye via a contact lens. The minimum force required to induce a venous pulsation is called the ophthalmodynamometric force (ODF). The RVP is defined and calculated as the sum of ODF and intraocular pressure (IOP) [RVP = ODF + IOP]. Results: The RVP decreased significantly after 3weeks in both eyes of patients treated with low-dosed Nifedipine compared to the untreated group (mean decrease of 12.5mmHg (SD 12.5), P < 0.001). A larger response to therapy was found in patients with the FS compared to patients lacking the FS (mean decrease of 16.07 vs. 7.28mmHg, confidence Interval (CI): 5.2 to 9.3 vs. 12.3 to 19.7; P < 0.001). No significant differences were accounted for in the IOP's of the patients after treatment. In the untreated control group, no significant differences were accounted for either in the RVP or the IOP after 3weeks. Conclusions: Treatment with low-dosed Nifedipine decreases RVP in both eyes of glaucoma patients, particularly in those with the Flammer-Syndrome. This effect may be due to the partial inhibition of Endothelin-1 (ET-1) by Nifedipine.