Subclinical hypothyroidism and coronary heart disease

Journal reference: Rondondi N, den Elzen WPJ, Bauer DC, et al. Subclinical hypothyroidism and the risk of coronary heart disease and mortality. JAMA. 2010;304(12):1365-1374 [1]

Link: http://dx.doi.org/10.1001/jama.2010.1361

Evidence cookie says...

Subclinical hypothyroidism (elevated TSH with normal thyroxine levels) is associated with increased risk of coronary heart disease (CHD) events and mortality.

  • TSH levels ≥ 7.0 mIU/L → trend for increasing risk.
  • TSH level up to 6.9 mIU/L → no increased risk

It is reasonable that asymptomatic subclinical hypothyroidism with minimal increases of TSH up to 6.9 mIU/L not require treatment with thyroxine. However, testing for thyroid antibodies and TSH monitoring is recommended to detect conversion to overt hypothyroidism.

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