针刺内关穴对心肌缺血调整作用的机理研究

Therapeatic Mechanism of Electroacupuncture of Neiguan (PC6) for Acute Myocardial Ischemia

[目的]家兔蓝斑区注射P物质(substance P,SP)及其拮抗剂,观察其在心肌缺血及电针过程中的效应。[方法]结扎兔冠脉左室支制作心肌缺血模型,采用脑立体定位仪定位蓝斑,动态观测心电图ST段电位的变化和心肌的形态学改变。[结果]P物质注入蓝斑有促进急性心肌缺血恢复的作用,且能加强电针内关对缺血心肌的改善,但被P物质拮抗剂注入蓝斑所阻断。[结论]结果提示SP在电针内关穴减轻急性心肌缺血损伤过程中起重要作用,可能是内关与心脏相关联系的重要介质。

[Objective] To investigate the influence of injection of substance P (SP) and its antagonist into locus ceruleus on electroacupuncture of Neiguan for acute myocardial ischemia (AMI). [Methods] Rabbit model of AMI was set up by ligating left ventricular branch of coronary artery. Forty-nine rabbits were allocated to five groups: Group A (the control group), Group B (electroacupuncture of Neiguan), Group C (injection of SP), Group D (electroacupuncture of Neiguan and injection of SP) and Group E (electroacupuncture of Neiguan and injection of SP antagonist) . Locus ceruleus was located by cerebral stereotaxic apparatus. Dynamic changes of ST segment of electrocardiogram and morphological feature of myocardium were observed. [ Results ] Injection of SP promoted the recovery of AMI and enhance the effect of electroacupuncture of Neiguan for AMI. However, the above effects were counteracted by the injection of SP antagonist. [Conclusion] SP plays an important role in reducing the damage of AMI on electroacupuncture of Neiguan and may serve as an important mediator for the connection of Neiguan and the heart.