Despite poisoning by Aconitum species, they are widely used as herbal medicines in Asia. There is no information on the changes in serum aconitine levels in patients under hemoperfusion. Herein, we report the relationship of clinical presentations and serum aconitine concentrations with hemoperfusion treatment in two patients. We found that the serum level of aconitine correlated with arrhythmia. Furthermore, early extra-corporeal membrane can improve survival in cases of fatal ventricular tachycardia/fibrillation. Our results affirm that hemoperfusion cannot accelerate the elimination of aconitine based on analysis the serum aconitine levels.