A nurse is assessing an adolescent who has an exacerbation of Graves' disease (hyperthyroidism). Which of the following findings should the nurse expect?

Choice A reason: Bradycardia is not associated with Graves' disease, which causes hyperthyroidism, increasing metabolic rate and heart rate. Excess thyroid hormone accelerates cardiac activity, leading to tachycardia, not slowed heart rate, making this an incorrect finding for an exacerbation of this condition. Choice B reason: Weight gain is unlikely in Graves' disease, as hyperthyroidism increases metabolism, causing weight loss despite increased appetite. Excess thyroid hormone accelerates caloric expenditure, leading to fat and muscle breakdown, making weight gain atypical during an exacerbation of this condition. Choice C reason: Heat intolerance is a hallmark of Graves' disease due to hyperthyroidism increasing metabolic rate, generating excess body heat. The sympathetic nervous system is overstimulated, impairing heat dissipation, causing sweating and discomfort in warm environments, a common symptom during disease exacerbation. Choice D reason: Lethargy is not typical in Graves' disease, as hyperthyroidism causes increased energy, restlessness, and insomnia due to elevated metabolism. Fatigue may occur from sustained hyperactivity, but lethargy is more associated with hypothyroidism, making this an incorrect finding for this condition.