Mortality of atrial fibrillation in a population selected to be free of major cardiovascular impairments.

The magnitude of additional mortality produced by the development of atrial fibrillation not associated with major cardiovascular risk factors is demonstrated. In a community-based population followed for 10 years, men aged 55-74 years had a mortality ratio of 260% and an excess death rate of 57. Women in the same age group had a mortality ratio of 335% and an excess death rate of 59. Were one to use an industry expected life table instead of the author's selected community population, the mortality ratios and excess death rates would be higher. Charging an extra premium for individuals with atrial fibrillation is supported by this increased mortality risk.