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[NOAC: Real-life data and the role of antidotes for the treatment of bleeding].

The non-vitamin K antagonists (NOAC) are an integral component of our antithrombotic prevention and therapy. For four of the NOAC, their non-inferiority or even superiority versus vitamin K antagonists (VKA) has been proven. Thus, the management of special patient cohorts or the management of active bleeding complications is a focus of current discussion.In addition to prospective trials, numerous retrospective analyses of health insurers or public health provider data have been analyzed and published as "real life" or "real-world evidence" data. In almost all data sets the results of the NOAC approval trials were confirmed, demonstrating their non-inferiority or even superiority versus VKA. Attempts to compare the various NOAC with each other must be viewed critically since the real-world evidence (RWE) analysis provides very divergent results depending on the cohorts analyzed. Thus, a substantial prescriber-bias must be taken into account and never be excluded.In order to improve the management of bleeding complications, NOAC antidotes were developed. While the factors Xa antidote, andexanet alpha, a modified coagulation factor deleted of an intrinsic activity, will not be available before 2018, the dabigatran antidote idarucizumab is already in clinical use. Idarucizumab, a monoclonal antibody fragment directed against dabigatran, is able to completely antagonize the effect of dabigatran within minutes. Therefore, the drug has the potential to terminate life-threatening bleeding complications earlier and make emergency surgical or interventional procedures possible without an elevated bleeding risk.

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