Can I reverse my atrial fibrillation? It was discovered 6 months ago during a colonoscopy. I am female, 67 years old, trying to lose at least 75 pounds, started on Warfarin, 5mg, just now and my blood pressure averages 110 over 65 to 70. I happen to have the mindset that everything is reversible/curable. My weight is really bad and I know it is not helping anything. I walk every day and am going to start increasing the distance.