| TH | Thyroid hormones |
| T3 | triiodothyronine |
| T4 | thyroxin |
| ETC | electron transport chain |
| ROS | reactive oxygen species |
| SOD | superoxide dismutase |
| GPx | glutathione peroxidase |
| CAT | catalase |
| CI | complex I |
| CII | complex II |
| CIII | complex III |
| CIV | complex IV |
| C I + III | complex I + III |
| C II + III | complex II + III |
| CS | citrate synthase |
| TBARS | thiobarbituric acid reactive substances |
| HHM | hyperthyroid heart mitochondria |
| CHM | control heart mitochondria |
| GSH | glutathione |
| GSSG | glutathione disulfide |
| TMPD | nonphysiological electron—donating compound |