A nurse is assessing a client with a suspected thyroid disorder. Which assessment finding would the nurse most strongly associate with hyperthyroidism?

Rationale: A. Hyperthyroidism is characterized by an excess of thyroid hormones (T3 and T4), which increase the body’s basal metabolic rate. This accelerates metabolism, leading to weight loss despite normal or increased appetite. Unintentional weight loss is a hallmark clinical manifestation of hyperthyroidism and strongly suggests overactive thyroid function. B. Cold intolerance is typically associated with hypothyroidism, where decreased thyroid hormone production slows metabolism and reduces heat generation. Clients with hyperthyroidism usually experience heat intolerance due to increased metabolic activity. C. Fatigue and lethargy are more characteristic of hypothyroidism, resulting from slowed metabolism. In hyperthyroidism, clients often have increased energy, restlessness, and hyperactivity, although extreme hyperthyroidism can eventually lead to fatigue from prolonged hypermetabolic state. D. Bradycardia (slow heart rate) is associated with hypothyroidism. In contrast, hyperthyroidism often causes tachycardia, palpitations, or increased heart rate, as thyroid hormones stimulate the cardiovascular system.