Metoprolol
"When, I tried Warfarin, I bruised considerably. Switched to a light dose (25mg) of  Metoprolol and have nearly complete relief. The few times a month I feel the heart flutter, I take a second 25mg. Problem completely solved without the risks of blood thinners. Also, I think blood thinners reduce some of the consequences of Atrial fibrillation without reducing the actual flutter."