• C01BA Antiarrhythmics, class ia 4 medications
• C01BB Antiarrhythmics, class ib 1 medications
• C01BC Antiarrhythmics, class ic 14 medications
• C01BD Antiarrhythmics, class iii 13 medications
• C01BG Other antiarrhythmics, class i and iii 1 medications