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Flosequinan in chronic heart failure: how is exercise capacity improved?

Banning, A. P., Ramsey, M. W., Jones, E. A., Evans, W. ORCID: https://orcid.org/0000-0003-0013-8205, Carolan, G., Jones, C. H. and Henderson, A. H. 1996. Flosequinan in chronic heart failure: how is exercise capacity improved? European Journal of Clinical Pharmacology 51 (2) , pp. 133-138. 10.1007/s002280050173

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Abstract

Objective: Diuretics, angiotensin converting enzyme inhibitors and digoxin have become “standard” triple therapy for many patients with chronic cardiac failure. Flosequinan increases exercise duration and improves symptoms when added to standard triple therapy. Despite intensive study, the clinical pharmacology of flosequinan remains uncertain. Setting: The University Hospital of Wales, a Regional Cardiac Centre. Patients: Twenty four patients with chronic heart failure who remained symptomatic despite standard therapy including ACE inhibitors Methods: A double-blind placebo-controlled parallel group study of 100 mg daily of flosequinan. We measured changes in exercise duration using cardiorespiratory exercise testing and changes in large artery distensibility using Doppler ultrasound. Results: Exercise duration after 8 weeks flosequinan treatment was significantly greater than following placebo treatment. The flosequinan-related increase in exercise duration (+14%) was associated with a significant reduction in VE/VCO2 slope (−16%). Brachial-radial pulse wave velocities were unaltered by flosequinan treatment. Conclusions: Our results confirm that flosequinan improves exercise duration in patients with chronic heart failure. They suggest that this observed beneficial effect is independent of any change in large artery distensibility and that in the presence of ACE inhibitors, this improvement may be independent of any vasodilating action of flosequinan. Although this study confirms the beneficial symptommatic effects of flosequinan in chronic cardiac failure, clinical trials have subsequently demonstrated an overall increase in mortality in patients treated with 100 mg flosequinan daily. This has resulted in the withdrawl of flosequinan from routine clinical use.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Medicine
Publisher: Springer Verlag (Germany)
ISSN: 0031-6970
Date of Acceptance: 28 March 1996
Last Modified: 10 Nov 2022 09:57
URI: https://orca.cardiff.ac.uk/id/eprint/145213

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