Table 1. Patients' Characteristics.

	SR(n = 10)	AF(n = 13)
Age(years)	53.2±13.4	52.7±9.7
Sex	4M/6F	5M/8F
EF (%)	58.9±7.2	58.8±8.0
LA diameter(mm)	47.8±4.9	59.4±10.5*
Cardiac Function(NYHA)	2II/8 III	3II/10 III

There were no significant statistical differences between sinus rhythm group and AF group in sex, the kind of EF and degrees of cardiac function. *P<0.01 vs. SR. Atrial fibrillation, atrial fibrillation, SR, sinus rhythm; EF, left ventricular ejection fraction; LA, left atrium, NYHA, the New York Heart Association.