N-acetyl procainamide causing torsades de pointes.
D000120:Acecainide / Q000009:adverse effects*; D000368:Aged; D000889:Anti-Arrhythmia Agents / Q000008:administration & dosage; D004359:Drug Therapy, Combination; D004562:Electrocardiography; D005260:Female; D006801:Humans; D011342:Procainamide / Q000031:analogs & derivatives*; D013610:Tachycardia / Q000139:chemically induced* / Q000175:diagnosis / Q000188:drug therapy
D000889:Anti-Arrhythmia Agents; D000120:Acecainide; D011342:Procainamide