Which of these conditions requires reactive interventions in Advanced Life Support?

Bradycardia with symptoms is the condition that requires reactive interventions in Advanced Life Support because it signifies a potentially serious cardiac issue that may compromise the patient's hemodynamic status. When bradycardia is accompanied by symptoms such as dizziness, weakness, or altered mental status, it indicates that the heart rate is insufficient to adequately perfuse vital organs. In such cases, immediate action may be necessary to stabilize the patient, which could involve administering medications like atropine, providing intravenous fluids, or even preparing for pacing if the bradycardia is severe and symptomatic.

In contrast, while hypoglycemia is also a critical condition requiring prompt treatment, the intervention typically involves providing glucose rather than reactive measures associated directly with cardiac function. Hyperventilation generally involves managing anxiety and addressing the underlying cause rather than immediate reactive interventions. A headache, unless associated with other signs suggesting a more serious condition, does not usually necessitate immediate reactive measures in an ALS context. Therefore, bradycardia with symptoms stands out as the condition that demands urgent reactive interventions to ensure patient safety and restore normal physiological function.