Heart Rate Variability after Off-Pump versus On-Pump Coronary Artery Bypass Graft Surgery

[摘要] Background.It is known that after coronary artery bypass graft surgery (CABG) heart rate variability (HRV) becomes significantly decreased with a gradual recovery in a few months after surgery. However, literature data about the impact of the off-pump CABG on postoperative HRV are not complete. Therefore, the aim of this study was to analyze postoperative value of HRV in CABG patients operated on with off-pump versus on-pump coronary surgery.Methods.This study included 206 consecutive patients who underwent CABG. Sixty six patients (32%) were operated on off-pump while 140 patients (68%) were operated on using the machine for extracorporal circulation. HRV was analyzed from 24-hours Holter electrocardiogram recordings.Results.No significant differences in postoperative values of HRV variables were found between off-pump versus on-pump CABG patients (Mean RR interval 885±106 versus 879±125 ms, standard deviation of all normal R-R intervals 107±30 versus 105±34 ms, NS, total power 2298±2472 versus 2156±1913 ms2, NS).Conclusions.The results of the study showed that there are no differences in HRV few months after surgery between patients operated on with off-pump versus on-pump CABG.

[学科分类] 心脏病和心血管学