With the decrease of frequency, the prolongation of APD_(90) induced by Haloperidol with fixed concentration was more obvious than before, and a marked prolongation was seen at 30bpm and 60bpm.

• 氟哌啶醇固定浓度时,随着频率的降低,APD_(90)的延长作用逐渐增加,在频率为60bpm和90bpm时,APD_(90)的延长作用很明显。