Clinically unrecognized mitral regurgitation is prevalent in lone atrial fibrillation

Table 1 Baseline characteristics of subjects

Demographic data	AF group(n = 57)	NSR group(n = 100)	P value(a = 0.05)
Age (mean ± SD)	50.2 ± 7.3	51.7 ± 6.1	0.17 NS
Male sex	39 (68)	66 (66)	0.86 NS
Comorbidities
Hypertension (controlled)	8 (14)	19 (19)	0.51 NS
Diabetes mellitus	0 (0)	13 (13)	< 0.05
Chronic lung disease	0 (0)	9 (9)	< 0.05
Chronic kidney disease	0 (0)	6 (6)	0.08 NS
Cerebrovascular disease	0 (0)	3 (3)	0.55 NS

AF: Atrial fibrillation; NSR: Normal sinus rhythm; NS: Not significant.

Table 2 Chamber dimensions

Measurements	AF group(n = 57)	NSR group(n = 100)	P value(a = 0.05)
LV ejection fraction (%)	68 ± 6	66 ± 9	0.13 NS
LV end diastolic diameter (cm)	5.4 ± 0.7	5.5 ± 0.5	0.30 NS
LA diameter (cm)	3.7 ± 0.5	3.6 ± 0.6	0.28 NS
Mitral annulus diameter (cm)	4.0 ± 0.4	3.4 ± 0.5	< 0.0001

AF: Atrial fibrillation; NSR: Normal sinus rhythm; LV: Left ventricle; LA: Left atrial; NS: Not significant.