氟卡胺对缺血和再灌注心肌的抗颤作用及对血流动力学的影响

Effect of flecainide on ventricular fibrillation and hemodynamics in ischemic and reperfused myocardium in dogs

本文测试抗心律失常新药氟卡胺对犬缺血心肌及再灌注心肌的抗颤作用及对血流动力学的影响。结果表明该药可显著延长心室有效不应期,提高室颤阈值,但有一定的负性肌力作用。

Flecainide is a relatively new Ic type of antiarrhythmic drug widely used in the control of ventricular tachyarrhythmia. Aim of the present study is an attempt to attest if the ventrucular fibrillation threshold (VFT) can be raised by flecainide. The mean VFT of left ventricle in the control was 29.77=4.5mA. The values were 9.58=1.42mA and 28.00=4.51mA during ischemia and reperfusion, respectively. After injection of flecainide the mean VFT in all the three steps increased strikingly (control: 44.54±2.08, ischemia: 38.25±4.34, reperfusion: 39.08+3.24,P<0.05 or 0.01). These results showed that flecainde can definitely raise the VFT in normal, reperfused and especially in ischemic canine myocardium. The decrease of CO showed the negative inotropic effect of flecainide.