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Hyperventilation syndrome is often anxiety-related and produces respiratory alkalosis, leading to paresthesias, dizziness, and carpopedal spasms. The EMT’s immediate role is to calm the patient and provide coaching for controlled, slower breathing—such as counting breaths or breathing with the rescuer. Option A is unnecessary since the patient is ventilating effectively, albeit too fast. Option C adds oxygen, which does not address the underlying hyperventilation and may reinforce anxiety. Option D (paper bag) is no longer recommended due to risk of hypoxia or missing a serious differential (e.g., pulmonary embolism, metabolic acidosis). Reassurance and verbal coaching are often sufficient. Monitor closely for underlying conditions that may mimic anxiety—such as asthma, hypoglycemia, or cardiac issues—and be ready to intervene if symptoms change. Scene management and reassurance are critical EMT skills, especially in behavioral emergencies where patient anxiety can mimic or mask more serious illness.