Table 1.

Basic characteristics of the included studies.

Study	Study characteristics	AF duration	N	AF recurrence rate	Follow-up period	AF detection	Detection index
Lewicka et al.[7]	preserved LVEF 55±5%	median 51 days	52	92%	12 months	pacemaker logs	BNP
Andersson et al.[8]	10% patients with heart failure	>7 days	199	54%	1 month	ECG	NT-proBNP
Mukherjee et al.[9]	preserved LVEF 56.78±140.6%	<1 year	82	44%	12±2 weeks	Physical, ECG	NT-proBNP
Govindan et al.[10]	preserved LVEF>50%	<18 months	54	61%	12 months	Holter, ECG, physical	NT-proBNP
Kawamura et al.[11]	preserved LVEF 61.1±9.6%	37±26 days	142	38%	24 months	ECG	BNP
Barassi et al.[12]	preserved LVEF 58.7±6%	3 months	57	33%	3 weeks	ECG	BNP
Falcone et al.[13]	NYHA I or II	93±65 days	93	28%	6 months	Holter, ECG	BNP
Wozakowska-Kaplon et al.[14]	NYHA I, LVEF 58.1±6.4 %	>48 hours, <12 months	77	39%	6 months	ECG, Holter	BNP
Kallergis et al.[15]	LVEF 57.1± 8.5%	>3 months	40	23%	1 month	ECG	NT-proBNP
Ari et al.[16]	preserved LVEF 55.5±2.98%	23.2±6.5 months	58	34.5%	6 months	ECG	BNP
Mollmann et al.[17]	LVEF >45%	181.5±327days	49	36%	4 weeks	Holter, ECG	NT-proBNP
Lombardi et al.[18]	LVEF >45%	1 month-1 year	53	34%	3 weeks	Holter, ECG	NT-proBNP
Tveit et al.[19]	NHYA I	median 10.5 weeks	129	69%	6 months	ECG	NT-proBNP
Buob et al.[20]	LVEF 57±11%	90±75 days	25	44%	4 weeks	Physical, ECG	NT-proBNP
Shin et al.[21]	normal LVEF	10.9±8.3 weeks	34	29.4%	11 days	ECG	NT-proBNP
Lellouche et al.[22]	NYHA I or II	3.7 months	66	45%	1 year	ECG	BNP
Mabuchi et al.[23]	NYHA II or III	mean 5.8 months	65	45%	553 days	Physical, ECG	BNP
Beck-da-Silva et al.[24]	NYHA I or II, preserved LVEF	6 months	14	36%	2 weeks	ECG	BNP
Watanabe et al.[25]	NYHA I -III, LVEF 59±10%	(1-350) days	84	76%	12 months	Holter, ECG	BNP

AF=atrial fibrillation; BNP=brain natriuretic peptide; ECG=electrocardiogram; LVEF=left ventricular ejection fraction; NYHA=New York Heart Association