Table 1. List of excluded articles and respective reasons.

DF = Dominant Frequency

Author and year	Title	Exclusion
Bencsik et al 2009	Acute effects of complex fractionated atrial electrogram ablation on dominant frequency and regulatory index for the fibrillatory process	No follow-up.
Biviano et al 2015	Atrial electrogram discordance during baseline vs reinduced atrial fibrillation: Potential ramifications for ablation procedures	No clinical outcome and follow-up.
Garibaldi et al 2012	Predicting catheter ablation outcome in persistent atrial fibrillation using atrial dominant frequency and related spectral features	No follow-up.
Grzeda et al 2009	Complex fractionated atrial electrograms: Properties of time-domain versus frequency-domain methods	Model creation.
Lee et al 2011	Relationship among complex signals, short cycle length activity, and dominant frequency in patients with long-lasting persistent AF: A high-density epicardial mapping study in humans	No clinical outcome and follow-up.
Lin et al 2012	A Prospective, Randomized Comparison of Modified Pulmonary Vein Isolation Versus Conventional Pulmonary Vein Isolation in Patients with Paroxysmal Atrial Fibrillation	DF analysis of individual beat.
Salinet et al 2014	Distinctive patterns of dominant frequency trajectory behavior in drug-refractory persistent atrial fibrillation: Preliminary characterization of spatiotemporal instability	No clinical outcome and follow-up.
Takahashi et al 2006	Organization of frequency spectra of atrial fibrillation: Relevance to radiofrequency catheter ablation	No clinical outcome and follow-up.
Takahashi et al 2008	Characterization of Electrograms Associated With Termination of Chronic Atrial Fibrillation by Catheter Ablation	No clinical outcome and follow-up.
Tuan et al 2011	Regional fractionation and dominant frequency in persistent atrial fibrillation: Effects of left atrial ablation and evidence of spatial relationship	No clinical outcome and follow-up.
Yokoyama et al 2009	Paroxysmal atrial fibrillation maintained by nonpulmonary vein sources can be predicted by dominant frequency analysis of atriopulmonary electrograms	No clinical outcome and follow-up.