Although atrial fibrillation is commonly associated with stroke, MVP is less commonly related to this serious outcome. Beta blockers help to relieve some of the symptoms associated with the MVP syndrome and can also reduce the recurrence rate of atrial fibrillation, however they can cause fatigue and slower heart rates in some patients. Regrettably, there is no safe medication to increase your heart rate, although you might consider discussing with your doctor whether a lower dose of beta blocker might be helpful in improving your fatigue.
The issue of coumadin is an important one. If atrial fibrillation was associated with the stroke, coumadin is indicated in the prevention of recurrent, disabling events. Aspirin therapy is an alternative treatment in some patients at low risk for recurrent episodes of atrial fibrillation. As you have done, it is wise to discuss these issues with your physician.
Information in the Heart Forum is for general purposes. Specific diagnoses and therapies can only be provided by your physician.