the factors involved in the appearance of this arrhythmia were the administration of antiarrhythmic drugs ( quinidine 22 patients , procainamide 5 patients , ajmaline 1 patient ) , antianginal drugs ( prenylamine [ synadrin ] 4 patients ) and antidepressant drugs ( thioridazine 1 patient ) .
C0003811
arrhythmia
C0034414
quinidine