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ORLANDO – People with an excessive blood level of vitamin D from overdosing with supplements had a 2.5-fold increased incidence of atrial fibrillation(A Fib), based on a study of 132,000 residents of Utah and southeastern Idaho. The finding "suggests the need for caution with vitamin D supplementation and the need for careful assessment of serum levels if high doses [of vitamin D] are used," Megan B. Smith said at the annual scientific sessions of the American Heart Association. The finding also suggests that patients identified with new-onset atrial fibrillation should be evaluated for a possible extremely high vitamin D level,...

I was diagnosed in May this year with A Fib. For those of you who do not know, that is a sometimes rapid and irregular heart beat.I'm on a beta blocker,and a blood thinner also to control my blood pressure.If you have it you know the symptoms. Lately I've been getting dizzy and a prickly feeling on my upper back if I get up too fast. (Yeah I know the joke line...get up slowly)My Doctor has just seen appropriate to up my meds slightly. Most of the time I feel great. But I've been having days like crap. I sometimes...

AP Medical Writer WASHINGTON -- At least 120,000 Americans a year suffer strokes because of a common irregular heartbeat -- one that's on the rise, hard to treat and can shoot deadly blood clots straight to the brain. Now doctors are experimenting with a new way to prevent those brain attacks: a tiny device that seals off a little section of the jiggling heart where the clots form. If it works -- and a major study is under way -- the Watchman device might provide long-needed protection for thousands of people with atrial fibrillation, whose main hope now is a...