title: Nonlinear heart rate variability analysis may predict atrial fibrillation after coronary artery bypass grafting.
abstract: BACKGROUND
  Heart rate variability might predict arrhythmias after coronary artery bypass grafting.
  
  
  METHODS
  Off-line processing of 10-min electrocardiogram recordings of consecutive patients provided R-R intervals for time domain, frequency domain, Poincaré, and point correlation analyses and subsequent association with postoperative atrial fibrillation by stepwise multivariate logistic regression.
  
  
  RESULTS
  Of 88 patients who met entry criteria, 13 developed atrial fibrillation. Peak point correlation dimension (odds ratio 3.985/unit, P = 0.0096) and age (odds ratio 1.144/yr, P = 0.0019) were independently associated with atrial fibrillation (c-statistic = 0.839).
  
  
  CONCLUSIONS
  Further study should confirm the ability of peak point correlation dimension to predict atrial fibrillation after coronary artery surgery with cardiopulmonary bypass.
authors.affiliation: Department of Anesthesia, Lankenau Hospital, Wynnewood, Pennsylvania, USA.
authors.forename: Dmitri
authors.initials: D
authors.lastname: Chamchad
authors.forename: George
authors.initials: G
authors.lastname: Djaiani
authors.forename: Hyun Ju
authors.initials: HJ
authors.lastname: Jung
authors.forename: Lev
authors.initials: L
authors.lastname: Nakhamchik
authors.forename: Jo
authors.initials: J
authors.lastname: Carroll
authors.forename: Jay C
authors.initials: JC
authors.lastname: Horrow
mesh_terms: D000368:Aged; D001281:Atrial Fibrillation / Q000453:epidemiology* / Q000209:etiology / Q000503:physiopathology; D001026:Coronary Artery Bypass / Q000009:adverse effects; D004562:Electrocardiography / Q000379:methods; D005260:Female; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D008297:Male; D008875:Middle Aged; D017711:Nonlinear Dynamics; D011183:Postoperative Complications / Q000453:epidemiology / Q000209:etiology / Q000503:physiopathology; D011237:Predictive Value of Tests