{"id":33469,"date":"2012-12-12T14:39:24","date_gmt":"2012-12-12T19:39:24","guid":{"rendered":"http:\/\/blogs.nejm.org\/cardioexchange\/?post_type=news&p=33469"},"modified":"2012-12-12T14:39:24","modified_gmt":"2012-12-12T19:39:24","slug":"boehringer-ends-phase-2-trial-of-dabigatran-in-mechanical-valve-patients","status":"publish","type":"post","link":"https:\/\/blogs.nejm.org\/cardioexchange\/2012\/12\/12\/boehringer-ends-phase-2-trial-of-dabigatran-in-mechanical-valve-patients\/","title":{"rendered":"Boehringer Ends Phase 2 Trial of Dabigatran in Mechanical Valve Patients"},"content":{"rendered":"

Boehringer Ingelheim today\u00a0announced<\/a>\u00a0that it had discontinued a phase 2 trial of its anticoagulant drug dabigatran (Pradaxa) in patients with mechanical heart valves.\u00a0As reported here in October<\/a>, the company had previously terminated one arm of the study after an interim review of the data by the trial’s\u00a0Data Safety Monitoring Board.<\/p>\n

The\u00a0RE-ALIGN trial<\/a>\u00a0was\u00a0an open-label, 12-week randomized comparison of warfarin and dabigatran in 400 patients who received a mechanical valve.\u00a0The first arm randomized patients during their initial hospital stay; the second arm randomized patients more than 3 months after their surgery.<\/p>\n

Despite the recent advent of novel oral anticoagulants, the much-maligned warfarin remains the only current option available for patients who have received a mechanical valve. Now the first trial to explore this indication for one of the newer oral anticoagulants has been stopped.<\/p>\n

In October, Boehringer told members of its speakers’ bureau that the\u00a0post-surgery arm of the trial had been terminated because of “lower than projected plasma levels of dabigatran in this population, and an imbalance in reports of thromboembolic events (primarily strokes).” At that time, the company said the second arm of the trial would continue.<\/p>\n

Dabigatran has been approved in Europe, but not in the United States, for venous thromboemoblism (VTE) prevention after knee- and hip-replacement surgery. Rivaroxaban (Xarelto) has been approved for both VTE prevention in the United States and Europe. To date there have been no head-to-head comparisons of the newer anticoagulants.<\/p>\n

According to\u00a0a recent study in<\/a>\u00a0Circulation: Cardiovascular Quality and Outcomes<\/a>,\u00a0<\/em>dabigatran now has about 19% of the oral anticoagulant market, mostly for the approved treatment of AF “but increasingly for off-label indications” as well.\u00a0A recent letter in the\u00a0Journal of the American College of Cardiology<\/em><\/a>\u00a0provided information about the off-label use of dabigatran in two mechanical valve patients. Both patients developed thrombosis after switching to dabigatran from warfarin. The authors noted that “while there is a wealth of data and clinical experience on dosing and therapeutic response to warfarin in this context, these data are unavailable for dabigatran.” Although newer anticoagulants “hold tremendous promise for mechanical valve anticoagulation… there is a need for dose-finding studies and clinical trials to demonstrate safety and efficacy in this setting.”<\/p>\n","protected":false},"excerpt":{"rendered":"

Boehringer Ingelheim today\u00a0announced\u00a0that it had discontinued a phase 2 trial of its anticoagulant drug dabigatran (Pradaxa) in patients with mechanical heart valves.\u00a0As reported here in October, the company had previously terminated one arm of the study after an interim review of the data by the trial’s\u00a0Data Safety Monitoring Board. The\u00a0RE-ALIGN trial\u00a0was\u00a0an open-label, 12-week randomized comparison […]<\/p>\n","protected":false},"author":196,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[495,20],"tags":[339,1589,1590,1588,422],"class_list":["post-33469","post","type-post","status-publish","format-standard","hentry","category-anticoagulation-2","category-cardiac-surgery","tag-dabigatran","tag-heart-valves","tag-mechanical-heart-valves","tag-oral-anticoa","tag-pradaxa"],"_links":{"self":[{"href":"https:\/\/blogs.nejm.org\/cardioexchange\/wp-json\/wp\/v2\/posts\/33469","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogs.nejm.org\/cardioexchange\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blogs.nejm.org\/cardioexchange\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.nejm.org\/cardioexchange\/wp-json\/wp\/v2\/users\/196"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.nejm.org\/cardioexchange\/wp-json\/wp\/v2\/comments?post=33469"}],"version-history":[{"count":0,"href":"https:\/\/blogs.nejm.org\/cardioexchange\/wp-json\/wp\/v2\/posts\/33469\/revisions"}],"wp:attachment":[{"href":"https:\/\/blogs.nejm.org\/cardioexchange\/wp-json\/wp\/v2\/media?parent=33469"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.nejm.org\/cardioexchange\/wp-json\/wp\/v2\/categories?post=33469"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.nejm.org\/cardioexchange\/wp-json\/wp\/v2\/tags?post=33469"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}