My husband has asymptomatic afib which was found by an annual physical ekg. The cardiologist tried twice to shock him back into rhythm but that only lasted each time a matter of days. He takes a blood thinner since the irregular heartbeat could result in blood pooling and then clots. Ablation in which a part of the heart that controls rhythm is cauterized (I think) is only done it seems when there are disturbing symptoms from the afib. So in effect what I am saying is that most afib seems to be nothing to be worried about other than the expense of the blood thinner, Anyone disagree?