Tabriz University of Medical Sciences Journal of Cardiovascular and Thoracic Research 2008-5117 10 1 2018 03 19 Comparative study of short-term cardiovascular autonomic control in cardiac surgery patients who underwent coronary artery bypass grafting or correction of valvular heart disease 28 35 10.15171/jcvtr.2018.05 EN Vladimir A Shvartz https://orcid.org/0000-0002-8931-0376 Anton R Kiselev https://orcid.org/0000-0003-3967-3950 Anatoly S Karavaev https://orcid.org/0000-0003-4678-3648 Kristina A Vulf https://orcid.org/0000-0001-8732-6721 Ekaterina I Borovkova https://orcid.org/0000-0002-9621-039X Mikhail D Prokhorov https://orcid.org/0000-0003-4069-9410 Andrey D Petrosyan Olga L Bockeria https://orcid.org/0000-0002-7711-8520 Journal Article 10.15171/jcvtr.2018.05 2017 10 16 2018 03 11 Introduction: Our aim was to perform a comparative study of short-term cardiovascular autonomic control in cardiac surgery patients who underwent coronary artery bypass grafting (CABG) or surgical correction of valvular heart disease (SCVHD). Methods: The synchronous 15 minutes records of heart rate variability (HRV) and finger’s photoplethysmographic waveform variability (PPGV) were performed in 42 cardiac surgery patients (12 women) aged 61.8 ± 8.6 years (mean ± standard deviation), who underwent CABG, and 36 patients (16 women) aged 54.2 ± 14.9 years, who underwent SCVHD, before surgery and in 5-7 days after surgery. Conventional time and frequency domain measures of HRV and index S of synchronization between the slow oscillations in PPGV and HRV were analyzed. We also calculated personal dynamics of these indices after surgery. Results: We found no differences (Р > 0.05) in all studied autonomic indices (preoperative and post-surgery) between studied patients’ groups, except for the preoperative heart rate, which was higher in patients who underwent SCVHD (P = 0.013). We have shown a pronounced preoperative and post-surgery variability (magnitude of inter-quartile ranges) of all autonomic indices in studied patients. In the cluster analysis based on cardiovascular autonomic indices (preoperative and post-surgery), we divided all patients into two clusters (38 and 40 subjects) which did not differ in all clinical characteristics (except for the preoperative hematocrit, P = 0.038), index S, and all post-surgery HRV indices. First cluster (38 patients) had higher preoperative values of the HR, TP, HF, and HF%, and lower preoperative values of the LF% and LF/HF. Conclusion: The variability of cardiovascular autonomic indices in on-pump cardiac surgery patients (two characteristic clusters were identified based on preoperative indices) was not associated with their clinical characteristics and features of surgical procedure (including cardioplegia).