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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Which of the following blood gas results is most likely in a patient with hyperventilation caused by anxiety?
assistant
The correct answer is  The behavioral respiratory control system of the brain drives the hyperventilation, which leads to decreased PCO2 and increased pH. If alkalemia is present with the hypocarbia, symptoms can be quite significant. They include dizziness, visual impairment, syncope, and seizures secondary to cerebral vasoconstriction; paresthesia's, carpopedal spasm, and tetany (secondary to decreased free serum calcium); muscle weakness (secondary to hypophosphatemia); and cardiac arrhythmias (secondary to alkalemia).