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 38-year-old woman comes to the physician because of a 1-month history of palpitations. She does not smoke or drink alcohol. Her pulse is 136/min and irregularly irregular. An ECG shows irregularly spaced QRS complexes with no distinct P waves. Treatment is started with a drug that slows atrioventricular node conduction velocity and prevents voltage-dependent calcium entry into myocytes. The patient is at greatest risk for which of the following adverse effects?
assistant
Gingival hyperplasia