COPENHAGEN — The risk of new-onset atrial fibrillation (AF) varies with thyroid function and is significantly increased even in subclinical hyperthyroidism--that is, even when low thyroid-stimulating ...

A randomized crossover trial evaluated the efficacy of different l-thyroxine dosing strategies and different target thyroid-stimulating hormone (TSH) ranges in patients with treated hypothyroidism.

Observational studies of thyroid function and dementia have reported conflicting results. We reviewed cohort and case-control studies from MEDLINE, EMBASE, Web of Science and the Cochrane Library that ...

High TSH levels can mean you have an underactive thyroid or a pituitary gland tumor. Low TSH levels can mean you have an overactive thyroid or issues with the pituitary gland. TSH levels are first ...

About 15 percent of the 10-12 million people in the U.S. with hypothyroidism, or an underactive thyroid, continue to feel sick despite following the standard of care recommended by the American ...

In many cases of central hypothyroidism (CH) serum TSH level remains normal, but CH should always be investigated if serum TSH levels are inappropriately low along with subnormal T 4 levels Most cases ...

Thyroid blood tests help figure out how well your thyroid gland is working. TSH helps the thyroid gland know when to make ...

Subclinical hyperthyroidism means that a person has low or undetectable levels of thyroid-stimulating hormone (TSH) with normal levels of free thyroid hormones. It usually does not cause symptoms. The ...

New research suggests that a slightly underactive thyroid may affect a women's ability to become pregnant -- even when the gland is functioning at the low end of the normal range. New research ...

Earlier this fall, Medscape Medical News spoke to endocrinologists Angela M. Leung, MD, and Karen Tsai, MD, on how to interpret abnormal results of thyroid hormone tests. To address some additional ...

Dear Dr. Roach: I am an 82-year-old woman in good health. I recently had labwork that showed my TSH level is 6.14. I was told that I would need thyroid medicine because eventually I would feel tired ...