[blk911]

A-fib is generally not immediately dangerous, but does need attention from a cardiologist to determine the cause. Because A-Fib is an extremely inefficient pumping action of the heart beating out of sequence, there is a tendency for the blood to pool and thereby significantly increase the risk of a clot that could cause a stroke.

There are many causes, sometimes too much caffeine, dehydration, alcohol or perhaps an extracurricular electrical circuit that the heart has grown over time which causes the electrical misfire. He needs a full cardio workup to determine why. Most likely he will continue to have them, perhaps with increasing frequency.

I have had two episodes of A-fib about 15 years apart, full cardio workups and they could figure out why other than I was producing too much adrenlin at the time of each. My episodes lasted about three days each before I spontaneously converted back to a normal synous rhythm.

Good luck.