title: Time of Occurrence and Duration of Atrial Fibrillation Following Coronary Artery Bypass Grafting.
abstract: BACKGROUND
  Dilatation of the left atrium and left ventricular diastolic dysfunction (DDLV) according to recent studies has significance in the occurrence of postoperative atrial fibrillation (AF), stroke and death. Authors of some studies found no relationship between these parameters and atrial fibrillation.
  
  
  OBJECTIVE
  this study is to determine the time of occurrence and duration of atrial fibrillation in patients after surgical revascularization (CABG) due to the presence of left ventricular diastolic dysfunction and left atrium dilatation and identify the most significant predictors of incident AF.
  
  
  METHODS
  Prospective study included 116 patients undergoing surgical myocardial revascularization followed from admission to discharge. The study was conducted at the Special Hospital "Heart Center BH" Tuzla for a period of one year (March 2011/2012 g.). For all patients was performed preoperative ultrasound examination, especially parameters of diastolic function of the left ventricle and left atrium volume index (LAVi), as the best parameter sized left atrium, and the postoperative occurrence of certain AF and day occurrence, duration in hours, the number of attacks. To assess whether an event occurred or not was used logistic regression, and the effect of time on the event of interest is analyzed by Cox 's regression hazard parallel.
  
  
  RESULTS
  75.9 % of patients had DDLV, and 91.4 % were hypertensives, 12.9 % from the previous stroke (ICV) and 42.2 % diabetics (DM), 14 % with COPD. The average age of patients was 61.41 ± 4.69 years. In both groups was 32.8 % women and 67.2 % men. LAVi preoperative values were significantly higher as DDLV greater degree. In patients with DDLV and higher values LAVi risk of AF is higher, the greater the length of AF and significantly higher number of attacks FA. Early occurrence of atrial fibrillation and its longer duration in function with increasing LAVi a marked increase in the value LAVi have the greatest hazard for the early appearance of atrial fibrillation. As a result of analysis of the most significant predictors of AF are DDLV and LAVi.
  
  
  CONCLUSIONS
  Postoperative atrial fibrillation occurs earlier and lasts longer in patients with DDLV and elevated left atrial volume index especially LAV > 36ml/m(2). LAVi has the best explanation of the function of hazard occurrence of atrial fibrillation after CABG.
authors.affiliation: BH Heart Center Tuzla, Bosnia and Herzegovina.
authors.forename: Sevleta
authors.initials: S
authors.lastname: Avdic
authors.affiliation: BH Heart Center Tuzla, Bosnia and Herzegovina.
authors.forename: Enes
authors.initials: E
authors.lastname: Osmanovic
authors.affiliation: BH Heart Center Tuzla, Bosnia and Herzegovina.
authors.forename: Nedzad
authors.initials: N
authors.lastname: Kadric
authors.affiliation: BH Heart Center Tuzla, Bosnia and Herzegovina.
authors.forename: Emir
authors.initials: E
authors.lastname: Mujanovic
authors.affiliation: Faculty of Pharmacy University of Tuzla, Bosnia and Herzegovina.
authors.forename: Merima
authors.initials: M
authors.lastname: Ibisevic
authors.affiliation: BH Heart Center Tuzla, Bosnia and Herzegovina.
authors.forename: Azra
authors.initials: A
authors.lastname: Avdic
mesh_terms: D001281:Atrial Fibrillation / Q000000981:diagnostic imaging / Q000209:etiology / Q000503:physiopathology*; D001026:Coronary Artery Bypass / Q000009:adverse effects*; D004108:Dilatation, Pathologic / Q000503:physiopathology / Q000601:surgery*; D004452:Echocardiography; D005260:Female; D006325:Heart Atria / Q000503:physiopathology / Q000601:surgery*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000000981:diagnostic imaging / Q000503:physiopathology*; D011237:Predictive Value of Tests; D011446:Prospective Studies; D018570:Risk Assessment; D012307:Risk Factors; D013997:Time Factors; D018487:Ventricular Dysfunction, Left / Q000503:physiopathology / Q000601:surgery*
keywords: atrial fibrillation; left atrial volume index; left ventricular diastolic dysfunction; surgical revascularization