首都医科大学学报 ›› 1988, Vol. 9 ›› Issue (3): 182-188.

• 论著 • 上一篇    下一篇

切断颈部双侧迷走神经干对刺激兔下丘脑诱发心律失常和增压反应的影响

曲瑞瑶, 杨果杰   

  1. 首都医学院生理学教研室
  • 收稿日期:1987-07-01 修回日期:1900-01-01 出版日期:1988-07-15 发布日期:1988-07-15

Effect of Bilateral Vagotomy on the Arrythmias and Pressor Response Induced by Stimulation of the Hypothamus in Rabbits

Qu Ruiyao, Yang Guojie   

  1. Department of Physiology, Capital Institute of Medicine
  • Received:1987-07-01 Revised:1900-01-01 Online:1988-07-15 Published:1988-07-15

摘要: 41只正常家兔,在局麻与肌松剂制动下分别用15~70μA,70Hz,1ms方波刺激下丘脑外侧区(LHA)和腹内侧核(VMH)区域,可诱发心律失常和增压反应,并存在相对特异性。刺激LHA时可诱发窦性心搏徐缓、窦性停搏和传导阻滞等慢速心律失常(Brady-arrythmias,BA),且发生率较高;刺激VMH则多见频发的室性期前收缩(Hypothalamic stimulation-induced Ventricular Extrasystoles,HVE),室性或室上性心动过速等快速心律失常(Tacky-arrythmias,TA)。静注阿托品或切断颈部双侧迷走神经干后刺激LHA或VMH则心律失常消失或阻抑。静注心得安或酚妥拉明后刺激LHA或VMH则TA消失或阻抑,而刺激LHA较VMH诱发BA更为明显。

关键词: 下丘脑外侧区, 下丘脑腹内侧核, 心律失常, 增压反应

Abstract: In rabbits under local anesthesia and immobilization extrasystales and elevation of arteral blood pressure could be provoked by stimulation of the Lateral Hypothalamic Area (LHA) and Ventromedial Hypothalamic Nucleus (VMH) with 15~70μA, 70Hz and 1ms duration square wave current. They have relatively differential. Brady-arrythmias, bradycardias, sinus cadiac arrest and block, could be provoked and its produce rade was higher during stimulation of LHA; on the other hand, tacky-arrythmias, frequent Hypothalamic stimulation-induced Ventricular Extrasystale (HVE) and tackycardias could be provoked and its produce rate Was higher during stimulation of VMH. Stimlus-eveked brady-arrythmia of LHA or VMH could be deleted or damped by injection Atropine of bilateral vagotomy, but stimulus-evoked tacky-arrhythmai of VMH could be deleted of damped. Stimulus-evoked tacky-arrythmia of VMH of LHA could be abated or damped by injection of Phentolamin and/or Propranolol, but stimulus-evoked brady-arrythmia of LHA could even more be enhanced of facilitied.

Key words: Lateral Hypothalamic Area (LHA), Ventromedial Hypothalamic Neucleus (VMH), arrhythams, pressor response