Dabigatran Versus Warfarin With NVAF Who Undergo PCI

Inclusion Criteria: 1. Aged ≥18 years; 2. Patients with non-secondary (e.g., pericarditis, hyperthyroidism, recent surgery, etc.) nonvalvular atrial fibrillation requiring long-term anticoagulant treatment; 3. Patients who have PCI indications and coronary heart disease that was successfully treated with drug-eluting stenting (DES); 4. Patients who sign the informed consent form. - Exclusion Criteria: 1. Patients with mechanical or biological heart valve prosthesis; 2. Patients proposed to undergo left atrial appendage occlusion or atrial fibrillation radiofrequency ablation 3. Cardiogenic shock during current hospitalization; 4. Patients who have used fibrinolytic agents within 24 hours of randomization that, in the opinion of the Investigator, will put the patient at high risk of bleeding; 5. Stroke within 1 month prior to screening visit; 6. Patients, who in the opinion of the Investigator, have had major surgery within the month prior to screening; 7. Patient has received an organ transplant or is on a waiting list for an organ transplant; 8. History of intraocular, spinal, retroperitoneal or a traumatic intra-articular bleeding unless the causative factor has been permanently eliminated or repaired (e.g. by surgery); 9. Gastrointestinal (GI) haemorrhage within one month prior to screening, unless, in the opinion of the Investigator, the cause has been permanently eliminated (e.g. by surgery); 10. Major bleeding episode (reduction in the haemoglobin level of at least 2 g/dL, transfusion of at least two units of blood, or symptomatic bleeding in a critical area or organ) including life-threatening bleeding episode (symptomatic intracranial bleeding, bleeding with a decrease in the haemoglobin level of at least 5 g/dL or bleeding requiring transfusion of at least 4 units of blood or inotropic agents or necessitating surgery) in one month prior to screening visit; 11. Haemorrhagic disorder or bleeding diathesis (e.g. von Willebrand disease, haemophilia A or B or other hereditary bleeding disorder, history of spontaneous intra-articular bleeding, history of prolonged bleeding after surgery/intervention); 12. Anaemia (haemoglobin \<10 g/dL) or thrombocytopenia including heparin-induced thrombocytopenia (platelet count \<100×109/L) at screening (Visit 1); 13. Severe renal impairment (estimated CrCl calculated by Cockcroft-Gault equation) \<30 mL/min at screening; 14. Active liver disease as indicated by at least one of the following: * Prior and persistent alanine aminotransferase (ALT) or Aspartate transaminase (AST) or alkaline phosphatase (AP) \>3 upper limit of normal (ULN); * Known active hepatitis C; ③Known active hepatitis B; ④Known active hepatitis A; 15. Recent malignancy or radiation therapy (≤6 months) unless, in the opinion of the Investigator, the estimated life expectancy is greater than 36 months; 16. Need for continued treatment with systemic ketoconazole, itraconazole, posaconazole, cyclosporine, tacrolimus, dronedarone, rifampicin, phenytoin, carbamazepine, or any cytotoxic/myelosuppressive therapy; 17. Patients who, in the Investigator's opinion, need continuous treatment with Non-Steroidal Anti-Inflammatory Drugs (NSAIDs); 18. Patients with a known allergy to dabigatran etexilate or to the excipients used for the capsule of the drug 19. Patients with a known allergy to warfarin tablets or to the excipients 20. Patients who, in the Investigator's opinion, should not be treated with OAC; 21. Patients with a contraindication to clopidogrel, or ASA 22. Pre-menopausal women (last menstruation ≤1 year prior to screening) who experienced any of the following conditions: * Are pregnant or breast feeding; ②Are pregnant surgically sterile; ③Are of child bearing potential and not practising two acceptable methods of birth control, or do not plan to continue practising an acceptable method of birth control throughout the trial. (Acceptable methods of birth control are oral or parenteral (patch, injection, implant) hormonal contraception which has been used continuously for at least one month prior to the first dose of study medication, intrauterine device or intrauterine system, double-barrier method of contraception (condom and occlusive cap or condom and spermicidal agent), male sterilization and complete sexual abstinence (if acceptable by local authorities)). Periodic abstinence is not an acceptable method of contraception.