Article

Heart rate variability measures poorly predict atrial fibrillation after off-pump coronary artery bypass grafting.

Department of Anesthesia, Lankenau Hospital and Lankenau Institute of Medical Research, Wynnewood, PA 19096, USA.
Journal of clinical anesthesia (impact factor: 1.32). 09/2011; 23(6):451-5. DOI:10.1016/j.jclinane.2010.12.016 pp.451-5
Source: PubMed

ABSTRACT To investigate associations of heart rate variability (HRV) measurements with postoperative atrial fibrillation (AF) in patients undergoing off-pump coronary surgery.
Prospective, observational, exploratory study.
Large university-affiliated community medical center.
50 patients undergoing off-pump coronary artery bypass grafting (CABG).
Preoperative recording of electrocardiograms (ECGs) with subsequent off-line HRV analysis. Monitored ECG telemetry for 5 days after operation.
Frequency and time domain analyses, and additional non-linear HRV determinations. Multivariate regression analysis of predictors of postoperative AF.
AF occurred in 23 (46%) patients. Only the low to high-frequency ratio was associated with AF (2.35 ± 1.8 v. 4.57 ± 5.0 for patients without AF, P < 0.05).
The off-pump approach does not protect against AF, and nonlinear HRV analyses provide little value in predicting AF after off-pump CABG.

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Keywords

5 days
 
50 patients undergoing off-pump coronary artery bypass grafting
 
additional non-linear HRV determinations
 
AF
 
ECGs
 
exploratory study
 
heart rate variability
 
high-frequency ratio
 
Large university-affiliated community medical center
 
Monitored ECG telemetry
 
Multivariate regression analysis
 
off-pump approach
 
off-pump CABG
 
patients
 
patients undergoing off-pump coronary surgery
 
postoperative AF
 
postoperative atrial fibrillation
 
Preoperative recording
 
subsequent off-line HRV analysis
 
time domain analyses
 

Dmitri Chamchad