Abstract Objective：To understand current the state of standardized anticoagulant therapy.In elderly patient with atrial fibrillation and analyze the factors that affect standard anticoagulant therapy，and at the same time，to make progress by the foundation of corresponding countermeasures.Method：Diagnosed nonvalvular atrial fibrillation
elderly patients were history inspected for a period of 12 months（ from January 2013 to December 2013） in 1st Hospital Cardiovascular Department，CHADS2 scheme method was used to stratify atrial fibrillation elderly patient and assess their risk of bleeding，the standardized anticoagulant therapy conditions were evaluated according to atrial fibrillation treatment guidelines.Result：A total of 161 patients were enrolled.According to the CHADS2 scheme，106 patients were divided into the high risk group，in which only 21 were on warfarin anticoagulant treatment.Among which 11（42.3%）had international normalized ratio（INR）in therapeutic range（2.0-3.0）.Conclusion：The percentage of standard anticoagulant treatment in elderly patients with atrial fibrillation is very low（38.4%），still more，the percentage of high risk patients using warfarin standard anticoagulant treatment is even low 19.8%.Further investigation and understanding of the causes of this phenomenon will help intervene effectively and improve the standard of anticoagulant therapy in patient with atrial fibrillation.
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