title: [Cox-maze III procedure for atrial fibrillation. A preliminary study].
abstract: OBJECTIVE
  To compare the efectiveness of the cut-and-sew Cox-maze III procedure against the Cox-maze IV peocedure by means of intraoperative bipolar radiofrequency delivery clamp.
  
  
  METHODS
  From January 2011 to October 2014, 50 patients were operated on with surgery for atrial fibrillation. All cases underwent mitral valve surgery as the first procedure, and secondarily a surgical procedure for atrial fibrillation was also performed. There were 2 groups. Group I (Cox-maze III «cut-and-sew»), and Group II (Cox-maze IV, intraoperative bipolar radiofrequency ablation). Group I was formed by 36 patients, and Group II by 14. All cases had atrial fibrillation longer than 1 year. The end-point was freedom of atrial fibrillation.
  
  
  RESULTS
  There was no statistically significant difference between both groups regarding the basal and operative characteristics. Operative mortality was of 2 cases in the Group I, and no cases for Group II (P=0.9). A high tendency to eliminate atrial fibrillation in favour of Group I was observed (92% vs 53%, P<.001) in a 6 months follow-up.
  
  
  CONCLUSIONS
  Classic standard Cox-maze III procedure showed superiority to eliminate atrial fibrillation over the Cox-maze IV procedure made with bipolar radiofrequency ablation clamp in patients with concomitant mitral valve disease.
authors.affiliation: Departamento de Cirugía Cardíaca, Hospital de Cardiología UMAE 34, IMSS, Monterrey, Nuevo León, México. Electronic address: ovidiogv@hotmail.com.
authors.forename: Ovidio A
authors.initials: OA
authors.lastname: García-Villarreal
mesh_terms: D001281:Atrial Fibrillation / Q000601:surgery*; D006348:Cardiac Surgical Procedures / Q000379:methods; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged
keywords: Arrhythmia; Arritmia; Atria; Atrial Fibrillation; Aurícula; Cardiac surgical procedures; Cox-maze; Fibrilación auricular; Mexico; Mitral valve; México; Procedimientos quirúrgicos cardíacos; Válvula mitral