I’ve recently read: “AFib is a condition common to people who maintain high heart rates over extended periods of time. For example most marathon and endurance type athletes will end up getting AFib when they perform their activities over many years. ... life-long endurance athletes such as left ventricular hypertrophy (enlarged lower left chamber of the heart) and consequently leaky mitral valves (heart valve between left atrium and left ventrical). Over a long period of many years…” In other words it suggests Afib has a strong correlation with athletic activity and the people who most suffer it tend to be athletes. Do the statistics bear this out? Are athletes the largest group of people who suffer atrial fibrillation? If not, what is the largest group in danger of having afib?