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In this review we present comparison of pharmacokinetics of novel oral anticoagulants (NOAC) dabigatran, rivaroxaban, apixaban, and edoxaban, principles of selection of a regimen of their dosing for phase III clinical trials in patients with atrial fibrillation. Multiplicity of administration of NOAC depends on required level of anticoagulation, ability to maintain anticoagulation for 24 hours, relationship between minimal and maximal levels of equilibrium concentrations, efficacy and safety. Once a day administration of some drugs of this group is reasonable from positions of clinical pharmacology. It can provide not only better adherence to treatment but greater safety relative to development of bleeding.

The article discusses the issue of searching for optimum oral anticoagulants to prevent thrombosis and embolism induced by heart disease both in patients with atrial fibrillation and sinus rhythm. A complex bidirectional relationship between atrial fibrillation and coronary atherosclerosis is considered along with possible mechanisms for development of myocardial infarction in patients with atrial fibrillation. The authors provided evidence-based data which can be used in selecting an anticoagulant for prevention of heart disease induced thrombosis and embolism taking into account both the efficacy and safety established in randomized clinical studies.