Overactivity of the thyroid gland, presenting as heart failure, arrhythmias (such as atrial fibrillation), weight loss, or psychological withdrawal.
This is more often a presentation of hyperthyroidism in older than in younger patients. Diagnosis is usually easier in the latter group because they present with the classic symptoms of hyperthyroidism.
SYN: subclinical h

Main entry:
hyperthyroidism