High-normal fT4 levels linked to AF risk

High-normal free thyroxine (fT4) levels are associated with an increased risk of atrial fibrillation, but TSH levels do not  appear to have the same association, a new study shows. A meta-analysis of data from more than 30,000 individuals in 11 cohorts who had thyroid function tests found a 45% higher risk of incident AF in ...

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