RT Book, Section A1 Idrose, Alzamani Mohammad A2 Tintinalli, Judith E. A2 Ma, O. John A2 Yealy, Donald M. A2 Meckler, Garth D. A2 Stapczynski, J. Stephan A2 Cline, David M. A2 Thomas, Stephen H. SR Print(0) ID 1166812353 T1 Hyperthyroidism and Thyroid Storm T2 Tintinalli's Emergency Medicine: A Comprehensive Study Guide, 9e YR 2020 FD 2020 PB McGraw-Hill Education PP New York, NY SN 9781260019933 LK accessmedicine.mhmedical.com/content.aspx?aid=1166812353 RD 2024/03/28 AB Thyroid hormone affects virtually all organ systems and is responsible for increasing metabolic rate, heart rate, and ventricle contractility, as well as muscle and CNS excitability. The thyroid hormones are thyroxine (T4) and triiodothyronine (T3). The ratio of T4 to T3 released in the blood is 10:1. Peripherally, T4 is converted to the active T3, which is three to four times more potent than T4.