title: Gabor frames for classification of paroxysmal and persistent atrial fibrillation episodes.
abstract: In this study, we propose a new classification method for early differentiation of paroxysmal and persistent atrial fibrillation episodes, i.e. those which spontaneously or with external intervention will return to sinus rhythm within 7 days of onset from the ones where the arrhythmia is sustained for more than 7 days. Today, clinicians provide patients classification once the course of the arrhythmia has been disclosed. This classification problem is dealt with in this study. We study a sparse representation of surface electrocardiogram signals by means of Gabor frames and afterwards we apply a linear discriminant analysis. Thus, we provide an early discrimination, obtaining promising performances on a heterogeneous cohort of patients in terms of pharmacological treatment and state of progression of the arrhythmia: 95% sensitivity, 82% specificity, 89% accuracy. In this manner, the proposed method can help clinicians to choose the most appropriate treatment using the electrocardiogram, which is a widely available and non-invasive technique. This early differentiation is clinically highly significant in order to choose optimal patients who may undergo catheter ablation with higher success rates.
authors.affiliation: I.U. Matemática Pura y Aplicada, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain. Electronic address: nuorar@upvnet.upv.es.
authors.forename: Nuria
authors.initials: N
authors.lastname: Ortigosa
authors.affiliation: Departament d'Anàlisi Matemàtica, Universitat de València, E-46100 Burjassot, Spain. Electronic address: antonio.galbis@uv.es.
authors.forename: Antonio
authors.initials: A
authors.lastname: Galbis
authors.affiliation: Departament d'Anàlisi Matemàtica, Universitat de València, E-46100 Burjassot, Spain. Electronic address: fernand@uv.es.
authors.forename: Carmen
authors.initials: C
authors.lastname: Fernández
authors.affiliation: Instituto de Investigación Sanitaria La Fe, Hospital Universitari i Politècnic La Fe Servicio de Cardiología, Planta 4-Torre F. Av. Fernando Abril Martorell no 106, 46026 Valencia, Spain. Electronic address: cano_osc@gva.es.
authors.forename: Óscar
authors.initials: Ó
authors.lastname: Cano
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001281:Atrial Fibrillation / Q000175:diagnosis* / Q000503:physiopathology / Q000628:therapy; D017115:Catheter Ablation; D004562:Electrocardiography; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012815:Signal Processing, Computer-Assisted
keywords: Atrial fibrillation; Electrocardiogram; Gabor frames