Zhu Y, Shen J, Xue Y, et al. - Thyroid-stimulating hormone (TSH) > 3.5 mIU/L was identified as an independent risk factor for long-term mortality in ST segment elevation myocardial infarction (STEMI).

• A total of 1186 STEMI patients admitted to hospital were included.

• Participants were classified as: Group 1 (TSH < 0.35 mIU/L), Group 2 (TSH 0.35– 1.0 mIU/L), Group 3 (TSH 1.0– 3.5 mIU/L), and Group 4 (TSH > 3.5 mIU/L).

• Worse long-term prognosis was observed with only TSH elevation beyond the normal range.

• There was no impact of high-normal TSH or reduced TSH on long-term prognosis.

• In Group 4, a remarkably lower cumulative survival was noted, whereas the other three groups were comparable.