AF is rarely fatal, although stroke is significantly disabling. Normally (well, I don't have any figure at hand and I'm not about to go and research it at the m

AF is rarely fatal, although stroke is significantly disabling. Normally (well, I don't have any figure at hand and I'm not about to go and research it at the moment, but I'm using the term in the sense of >50% but <85%) of AF instances come with some sort of symptoms... feeling faint, pounding chest, shortness of breath... good questioning can be fairly diagnostic in the doctors clinic or emergency room. But yes, as the Cardiogram guys point out in their reply to me, and in the source article, a significant number of people have strokes secondary to AF.