Taking in account the limitations of the present study, our study highlights the contribution of the A + genotype of the FGB −455 G/A polymorphism towards poor poststroke survival among 55–71 years old Caucasian women even after adjustment for arrhythmias, AF, CS, CRP, hypercholesterolemia, hypertension, hypertriglyceridemia, and history of MI with age and sex as confounding factors. This evidence concerns the gene FGB and atrial fibrillation.