TG and hyperthyroidism: A normal endocrine function is essential for the cardiovascular health.1 Hyperthyroidism is among the mostcommon endocrine disorders, with a prevalence of 1.3% in the United States2 and 0.7% (95% confidence interval[CI] 0.2-1.1%) in Brazil.3 Thiscondition is defined by increased levels of thyroid hormones (T3 and/or T4) andsuppressed or decreased levels of TSH.2