Final answer:
Kids with hyperthyroidism are at risk for cardiac collapse when they are stressed.
Step-by-step explanation:
Kids with hyperthyroidism are at risk for cardiac collapse when they are stressed (exercise, infection). When individuals with hyperthyroidism experience stress, it can trigger a condition called thyroid storm. Thyroid storm is a life-threatening condition characterized by a sudden release of large amounts of thyroid hormone into the bloodstream, leading to severe symptoms such as a rapid heart rate, high fever, confusion, and even cardiac collapse.