Table 1.
Time Course of Thyroid Function in Relation to Amiodarone Therapy
| Thyroid-stimulating hormone (mU/L) | Free thyroxine (pmol/L) | Free triiodothyronineb (pmol/L) | |
|---|---|---|---|
| Reference range | 0.35–3.50 | 2–21 | 3.8–6.0 |
| January 8, 2016 | 3.13 | 8 | Not measured |
| October 16, 2017 | 0.02 | 12 | 8.7 |
| December 13, 2017 | 3.21 | 8 | Not measured |
| March 4, 2018a | 0.02 | 13 | 5.8 |
| March 10, 2018 | Amiodarone started | ||
| March 21, 2018 | <0.01 | 41 | 14.7 |
aThe date of his myocardial infarction.
bAt our institution free triiodothyronine is only measured if thyroid-stimulating hormone concentration is suppressed.