Comparative study of short-term cardiovascular autonomic control in cardiac surgery patients who underwent coronary artery bypass grafting or correction of valvular heart disease

78 on-pump cardiac surgery patients (28 women) aged 59.8±11.8 years; 42 underwent coronary artery bypass grafting (CABG) and 36 underwent surgical correction of valvular heart disease (SCVHD). Excluded: abnormalities in heart rate impeding HRV analysis, severe heart failure, cardiomyopathy, endocrine pathology except compensated diabetes, cancer, organic brain/nervous system diseases, mental illness, peripheral microcirculation abnormalities, and symptomatic hypertension.

On-pump coronary artery bypass grafting (CABG) conducted on a beating heart in parallel perfusion and normothermia, without aortic cross clamping and cardioplegic solution

On-pump surgical correction of valvular heart disease (SCVHD) conducted in hypothermia and pharmacological cardioplegia with aortic cross clamping

Short-term cardiovascular autonomic control assessed by heart rate variability (HRV) and finger photoplethysmographic waveform variability (PPGV) indices before surgery and 5-7 days after surgerysurrogate