system
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
A 47-year-old woman comes to the physician because of a 3-week history of a dry cough. She does not smoke or use illicit drugs. Physical examination shows mild conjunctival hyperemia. Chest auscultation shows fine crackles in both lung fields. Laboratory studies show a total calcium concentration of 10.8 mg/dL. The results of spirometry are shown (dashed loop shows normal for comparison). Further evaluation of this patient is most likely to show an increase in which of the following?
assistant
Angiotensin-converting enzyme activity