| hyperthyroid | Excess of thyroid hormone resulting from an overactive thyroid gland (or taking too much thyroid hormone). (12 Dec 1998) |
|---|---|
| hyperthyroid heart | Response of the heart to hyperthyroidism, essentially the result of sympathetic stimulation producing rapid heart rates and ultimately cardiac failure and atrial fibrillation if untreated. (05 Mar 2000) |
| hyperthyroidism | 1. <physiology> Excessive functional activity of the thyroid gland. 2. <disease> The abnormal condition resulting from hyperthyroidism marked by increased metabolic rate, enlargement of the thyroid gland, rapid heart rate, high blood pressure and various secondary symptoms. (18 Nov 1997) |