title: Left atrial dysfunction and new-onset atrial fibrillation after cardiac surgery.
abstract: OBJECTIVE
  Postoperative atrial fibrillation is a common complication of carrying out cardiac surgery with extracorporeal circulation (ECC). The aim of this study was to determine whether preoperative left atrial contractile dysfunction, as assessed by tissue Doppler echocardiography, is associated with the development of postoperative new-onset atrial fibrillation (PAF).
  
  
  METHODS
  Transthoracic Doppler echocardiography was performed preoperatively in patients undergoing elective cardiac surgery. Left atrial contractile function was evaluated by tissue Doppler imaging (TDI) of the mitral annulus.
  
  
  RESULTS
  The study included 92 patients in sinus rhythm preoperatively who underwent elective cardiac surgery with ECC: 73 (79%) were male and 19 (21%) were female, and their mean age was 67 (10) years. Of these, 19 (20.6%) developed PAF 34 (12) h postoperatively. Bivariate analysis showed that PAF was associated with older age (71 [7] years vs 66 [10] years; P=.034), a large left atrial diameter (LAD), and a low peak atrial systolic mitral annular velocity (A velocity) and a high mitral E/A ratio on TDI. Logistic regression analysis showed that PAF was independently associated with a large LAD (odds ratio [OR] =2.23; 95% confidence interval [CI], 1.05-4.76; P=.033) and a low A velocity (OR=0.70; 95% CI, 0.55-0.99; P=.034).
  
  
  CONCLUSIONS
  Preoperative left atrial dysfunction, as assessed by TDI, was associated with an increased risk of PAF.
authors.affiliation: Servicio de Medicina Intensiva. Hospital Universitario de Canarias. La Laguna. Santa Cruz. España. joseluis.iribarren@gmail.com
authors.forename: José L
authors.initials: JL
authors.lastname: Iribarren
authors.forename: Juan J
authors.initials: JJ
authors.lastname: Jiménez
authors.forename: Antonio
authors.initials: A
authors.lastname: Barragán
authors.forename: Maitane
authors.initials: M
authors.lastname: Brouard
authors.forename: Juan
authors.initials: J
authors.lastname: Lacalzada
authors.forename: Leonardo
authors.initials: L
authors.lastname: Lorente
authors.forename: Rosalía
authors.initials: R
authors.lastname: Pérez
authors.forename: Lorena
authors.initials: L
authors.lastname: Raja
authors.forename: Rafael
authors.initials: R
authors.lastname: Martínez
authors.forename: María L
authors.initials: ML
authors.lastname: Mora
authors.forename: Ignacio
authors.initials: I
authors.lastname: Laynez
mesh_terms: D000368:Aged; D001281:Atrial Fibrillation / Q000209:etiology*; D002315:Cardiopulmonary Bypass / Q000009:adverse effects*; D015150:Echocardiography, Doppler; D017548:Echocardiography, Transesophageal; D005260:Female; D006325:Heart Atria / Q000000981:diagnostic imaging* / Q000503:physiopathology*; D006801:Humans; D008297:Male; D011300:Preoperative Care; D012307:Risk Factors