Tianjin Medical Journal ›› 2023, Vol. 51 ›› Issue (4): 422-426.doi: 10.11958/20221362

• Clinical Research • Previous Articles     Next Articles

Prediction of risk factors for hypothyroidism in NSTE-ACS patients exposed to iodine contrast media

HAN Chuyi1(), CONG Hongliang2, WANG Le2, ZHANG Jingxia2,()   

  1. 1 Clinical School of Thoracic, Tianjin Medical University, Tianjin 300222, China
    2 The Eighth Department of Cardiology, Tianjin Chest Hospital
  • Received:2022-09-14 Revised:2022-11-21 Published:2023-04-15 Online:2023-04-20
  • Contact: ZHANG Jingxia E-mail:402124067@qq.com;zhangjingxia001@126.com

Abstract:

Objective To explore the effect of iodine contrast media (ICM) on thyroid function and the risk factors of hypothyroidism in patients with non-ST segment elevation acute coronary syndrome (NSTE-ACS) after percutaneous coronary intervention (PCI). Methods According to the baseline thyroid stimulating hormone (TSH) level, 627 patients were divided into the hypothyroidism group (group H, n=62) and the euthyroid group (group ET, n=565). Changes of thyroid function were monitored at 1 day, 1 week, 1 month and 6 months after PCI, and the risk factors of hypothyroidism before and after PCI were analyzed by multivariate analysis. Results The levels of TSH increased significantly on the 1 day and 1 week after PCI in both groups (P<0.05), and group ET was still higher than its baseline value at 6 months (P<0.05). At 6 months, 43 of 62 cases in the group H were still in the state of hypothyroidism, but the event of overt hypothyroidism did not increase. In the group ET, there were 133 cases of ICM-induced hypothyroidism (23.9%), 34 cases of hypothyroidism and 4 cases of iodine-induced hyperthyroidism at 6 months. The independent predictors for hypothyroidism after ICM were not entirely consistent with the independent predictors for baseline hypothyroidism. The dosage of ICM was a reliable predictor for long-term hypothyroidism after PCI (AUC=0.674), and the best security threshold was 190 mL. Conclusion Patients with NSTE-ACS have a lower risk of developing overt hypothyroidism after ICM exposure. Taking 6 months after ICM exposure as a time window for study evaluation may mask some events of prolonged ICM-induced thyroid insufficiency.

Key words: contrast media, hypothyroidism, coronary disease, non-ST elevated myocardial infarction, acute coronary syndrome, percutaneous coronary intervention

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