ISSN : 1301-5680
e-ISSN : 2149-8156
TURKISH JOURNAL OF
THORACIC AND
CARDIOVASCULAR SURGERY
Turkish Journal of Thoracic and Cardiovascular Surgery     
The effect of thiol-disulfide homeostasis in patients undergoing on-pump coronary artery bypass grafting
Umut Serhat Sanrı1, Kadir Kaan Özsin1, Faruk Toktaş1, Abdullah Burak Balcı1, Yasemin Üstündağ2, Kağan Huysal2, Özcan Erel3, Şenol Yavuz1
1Department of Cardiovascular Surgery, University of Health Sciences, Bursa Yüksek İhtisas Training and Research Hospital, Bursa, Turkey
2Clinical Laboratory, University of Health Sciences, Bursa Yüksek İhtisas Training and Research Hospital, Bursa, Turkey
3Department of Clinical Biochemistry, Yıldırım Beyazıt University Faculty of Medicine, Ankara, Turkey
DOI : 10.5606/tgkdc.dergisi.2019.18033
Background: In this study, we aimed to investigate the effects of thiol-disulfide homeostasis in patients undergoing on-pump coronary artery bypass grafting.

Methods: Between January 2018 and October 2018, a total of 51 patients (43 males, 8 females; mean age 61.8±8.7 years; range, 38 to 78 years) who underwent isolated on-pump coronary artery bypass grafting were included. Thiol-disulfide homeostasis parameters were studied in the preoperative period (T1), 30 min after the removal of cross-clamp (T2), and postoperative sixth h (T3). Hemodynamic parameters such as atrial fibrillation and inotropic support requirement of the patients were evaluated in the postoperative period.

Results: There were significant differences in the measured thiol-disulfide homeostasis parameters at different time points of surgery (p<0.001). Binary logistic regression analysis showed that T2-disulfide/native thiol ratio was an independent predictor of the development of postoperative atrial fibrillation (p=0.042). There were positive and significant correlations between the T2-disulfide levels and cross-clamp time (r:0.307, p=0.029).

Conclusion: Thiol-disulfide homeostasis in patients undergoing on-pump coronary artery bypass grafting changes toward to disulfide. Disulfide levels increase in parallel with prolonged ischemia time. Decreased native thiol and increased disulfide levels during ischemic period may be predictive of postoperative atrial fibrillation.

Keywords : Coronary artery bypass grafting, oxidative stress, thioldisulfide homeostasis
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