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

Abstract EN

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.