Efficacy of a device to narrow the coronary sinus in refractory angina

Stefan Verheye, E Marc Jolicœur, Miles W Behan, Thomas Pettersson, Paul Sainsbury, Jonathan Hill, Mathias Vrolix, Pierfrancesco Agostoni, Thomas Engstrom, Marino Labinaz, Ranil de Silva, Marc Schwartz, Nathalie Meyten, Neal G Uren, Serge Doucet, Jean-François Tanguay, Steven Lindsay, Timothy D Henry, Christopher J White, Elazer R EdelmanShmuel Banai

    242 Citationer (Scopus)

    Abstract

    BACKGROUND: Many patients with coronary artery disease who are not candidates for revascularization have refractory angina despite standard medical therapy. The balloon-expandable, stainless steel, hourglass-shaped, coronary-sinus reducing device creates a focal narrowing and increases pressure in the coronary sinus, thus redistributing blood into ischemic myocardium.

    METHODS: We randomly assigned 104 patients with Canadian Cardiovascular Society (CCS) class III or IV angina (on a scale from I to IV, with higher classes indicating greater limitations on physical activity owing to angina) and myocardial ischemia, who were not candidates for revascularization, to implantation of the device (treatment group) or to a sham procedure (control group). The primary end point was the proportion of patients with an improvement of at least two CCS angina classes at 6 months.

    RESULTS: A total of 35% of the patients in the treatment group (18 of 52 patients), as compared with 15% of those in the control group (8 of 52), had an improvement of at least two CCS angina classes at 6 months (P=0.02). The device was also associated with improvement of at least one CCS angina class in 71% of the patients in the treatment group (37 of 52 patients), as compared with 42% of those in the control group (22 of 52) (P=0.003). Quality of life as assessed with the use of the Seattle Angina Questionnaire was significantly improved in the treatment group, as compared with the control group (improvement on a 100-point scale, 17.6 vs. 7.6 points; P=0.03). There were no significant between-group differences in improvement in exercise time or in the mean change in the wall-motion index as assessed by means of dobutamine echocardiography. At 6 months, 1 patient in the treatment group had had a myocardial infarction; in the control group, 1 patient had died and 3 had had a myocardial infarction.

    CONCLUSIONS: In this small clinical trial, implantation of the coronary-sinus reducing device was associated with significant improvement in symptoms and quality of life in patients with refractory angina who were not candidates for revascularization. (Funded by Neovasc; COSIRA ClinicalTrials.gov number, NCT01205893.).

    OriginalsprogEngelsk
    TidsskriftThe New England journal of medicine
    Vol/bind372
    Udgave nummer6
    Sider (fra-til)519-27
    Antal sider9
    ISSN0028-4793
    DOI
    StatusUdgivet - 5 feb. 2015

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