| ATC Codes | Pharmacological Classification | Pharmacological Classification/DDD |
|---|---|---|
| C | CARDIOVASCULAR SYSTEM | 心血管系统 |
| C01 | CARDIAC THERAPY | 心脏病治疗药 |
| C01B | ANTIARRHYTHMICS, CLASS I AND III | 抗心律失常药,Ⅰ类和Ⅲ类 |
| C01BA | Antiarrhythmics, class Ia | 抗心律失常药,Ⅰa类 |
| C01BA13 | hydroquinidine | 氢奎尼丁 |