PMID- 38505029 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20240321 IS - 2072-1439 (Print) IS - 2077-6624 (Electronic) IS - 2072-1439 (Linking) VI - 16 IP - 2 DP - 2024 Feb 29 TI - Low-normal free triiodothyronine as a predictor of post-operative atrial fibrillation after surgical coronary revascularization. PG - 1191-1200 LID - 10.21037/jtd-23-1646 [doi] AB - BACKGROUND: Recent studies have focused on the association between thyroid function within normal range and cardiovascular diseases, especially on free triiodothyronine (FT3) levels. This study aims to evaluate the effects of normal FT3 level on new-onset atrial fibrillation (AF) in patients with surgical coronary revascularization. METHODS: The patients who underwent surgical coronary revascularization were enrolled in the retrospective study. Thyroid function was tested after an overnight fast on the first morning of hospitalization. Serum FT3 level was divided into quartile groups within the normal range. Hazards ratios (HRs) of FT3 level for AF were analyzed by COX proportional hazard model. RESULTS: This study included 503 patients with a mean [standard deviation (SD)] age of 63 (+/-9) years, and 396 (78.73%) were male. Post-operative AF (POAF) occurred in 120 (23.86%) patients at a median of two days after surgical coronary revascularization. The cumulating incidence of AF was significantly higher in the FT3 quartile 1 (Q1) group especially in older patients as evidenced by Kaplan-Meier analysis. Additionally, the patients who experienced AF had longer hospital stays, the same result was also found in the FT3 Q1 group. Further study demonstrated that low-normal FT3 was an independent predictor of POAF [HR =1.52, 95% confidence interval (CI): 1.01, 2.28, P=0.045]. CONCLUSIONS: Low-normal FT3 is associated with an increased risk of POAF and is an independent predictor of POAF. Patients who experienced AF have longer hospital stays. The findings may help to identify patients with surgical coronary revascularization at a higher risk for the development of AF. CI - 2024 Journal of Thoracic Disease. All rights reserved. FAU - Hua, Cuncun AU - Hua C AD - Department of Cardiology, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China. FAU - Liu, Pengfei AU - Liu P AD - Department of Cardiology, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China. FAU - Zhang, Min AU - Zhang M AD - Department of Cardiology, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China. FAU - Niu, Jiayin AU - Niu J AD - Department of Cardiology, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China. FAU - Wang, Lefeng AU - Wang L AD - Department of Cardiology, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China. FAU - Zhong, Guangzhen AU - Zhong G AD - Department of Cardiology, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China. AD - Research Ward, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China. LA - eng PT - Journal Article DEP - 20240224 PL - China TA - J Thorac Dis JT - Journal of thoracic disease JID - 101533916 PMC - PMC10944733 OTO - NOTNLM OT - Atrial fibrillation (AF) OT - free triiodothyronine (FT3) OT - predictor OT - surgical coronary revascularization COIS- Conflicts of Interest: All authors have completed the ICMJE uniform disclosure form (available at https://jtd.amegroups.com/article/view/10.21037/jtd-23-1646/coif). The authors have no conflicts of interest to declare. EDAT- 2024/03/20 06:45 MHDA- 2024/03/20 06:46 PMCR- 2024/02/29 CRDT- 2024/03/20 04:02 PHST- 2023/10/27 00:00 [received] PHST- 2024/01/05 00:00 [accepted] PHST- 2024/03/20 06:46 [medline] PHST- 2024/03/20 06:45 [pubmed] PHST- 2024/03/20 04:02 [entrez] PHST- 2024/02/29 00:00 [pmc-release] AID - jtd-16-02-1191 [pii] AID - 10.21037/jtd-23-1646 [doi] PST - ppublish SO - J Thorac Dis. 2024 Feb 29;16(2):1191-1200. doi: 10.21037/jtd-23-1646. Epub 2024 Feb 24.