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
In deciding on a treatment for a 60 years old patient, Golu, who has chronic hea disease and rheumatoid ahritis, you wish to give him procainamide. He is already taking digoxin, hydrochlohiazide and potassium supplementation. Which of the following is a relevant statement?
assistant
The correct answer is  (Ref: KDT 6/e p512) Hyperkalemia increases the toxicity of class Ia antiarrhythmics.