. Author manuscript; available in PMC: 2008 Feb 15.

Published in final edited form as: Med Clin North Am. 2008 Jan;92(1):17–ix. doi: 10.1016/j.mcna.2007.09.002

Table 4.

Echocardiographic Predictors of Atrial Fibrillation: Framingham Study Subjects ages 50–59 Years

Echocardiographic	Atrial Fibrillation
Features	Risk
Left Atrial Size	29% incr. per 5mm
Left Ventricular Fractional Shortening	34% incr. per 5%
Left Ventricular wall thickness	28% incr. per 4 mm
Two or more of above vs none	17% vs 3.7%

Vazirí SM, et al Circulation 1994; 89:724–730.