Which medication order should a nurse clarify for a preschooler in congestive heart failure with wide QRS complexes and peaked T waves?

In a preschooler with congestive heart failure who presents with wide QRS complexes and peaked T waves, the order for potassium chloride should be clarified. The presence of peaked T waves often indicates hyperkalemia, which is an elevated potassium level in the blood. Wide QRS complexes can also suggest an underlying electrolyte imbalance, particularly related to potassium levels.

Since potassium chloride is a medication that increases potassium levels, administering it in this scenario could exacerbate the existing condition, potentially leading to life-threatening cardiac dysrhythmias. Therefore, the nurse must clarify this order to ensure the child's safety and health.

While diuretics like furosemide and medications such as captopril are commonly used in the management of heart failure, and regular insulin can be important in the treatment of hyperkalemia by facilitating potassium entry into cells, potassium chloride stands out as inappropriate in this context due to the signs of potential hyperkalemia.