FBL and Venous thrombosis: The regression coefficient (β) of the above logistic curve was used to construct a model to predict the risk of LAA thrombosis and SEC in NVAF patients: = 0.619*AF type + 0.654*previous stroke + 0.492*Fib + 0.9*LA − 0.64*LVEF + 0.214*LAA max caliber.