A nurse in the emergency department is caring for female client. Exhibits Select the 2 complications that are the greatest risk for the client who has hyperthyroidism.

A. Tremors: Common symptom of hyperthyroidism due to increased adrenergic activity, but typically not life-threatening. Managed with beta-blockers; lower risk compared to major complications. B. Thyroid storm: Acute, life-threatening exacerbation with high fever, severe tachycardia, altered mental status, and potential organ failure. Requires immediate ICU-level care; highest-risk complication. C. Insomnia: Frequent symptom from hypermetabolism and anxiety, but not a major complication. It impacts quality of life rather than posing immediate danger. D. Excessive sweating: Typical manifestation of increased metabolic rate and heat intolerance. Uncomfortable but not dangerous; manageable with symptom control. E. Dysrhythmias: Hyperthyroidism can precipitate atrial fibrillation and other tachyarrhythmias, increasing risk of thromboembolism and hemodynamic instability. Significant morbidity risk, especially in older adults.