Which anticoagulant (DOAC or Warfarin) would you recommend in the case of a 70-year-old male with persistent atrial fibrillation and history of rheumatic mitral stenosis now status post bioprosthetic MVR?  

There won't be perfect data on this, per the 2023 guidelines:The distinction between “valvular” and “nonvalvular “AF remains a matter of debate. Their definitions may be confusing. Recent trials comparing vitamin K antagonists with non-vitamin K antagonist oral anticoagulants...