Be sure to have your free T4 levels measured!!!

A research study published in October 2017 in the journal Circulation, evaluated more than 30,000 participants, and concluded that free thyroxine (free T4, or FT4) levels in the highest quartile of the reference range are associated with a 45 percent increased risk of AFib, compared to the lowest FT4 levels within the reference range. The second-highest quartile was associated with a 17percent greater risk, and the third-highest quartile had a 25 percent greater risk.