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20世纪80年代以前,心脏电生理检查主要通过药物手段来验证某些心律失常的产生机制(mechanism),以便指导药物治疗。后来,人们认识到抗心律失常药有其自身的缺陷,因而大力开展了非药物治疗技术,其中最突出的是射频消融和植入型除颤器。 心律失常发生的两个最主要的机理是自律性增高和折返激动。大部分心律失常是由折返引起,它们的形成需要2条或2条以上的径路参与,这些径路彼此在解剖或功能上相异、而电学上又相互联系。其中一条径路的传导速度必须足够慢,使得另一条径路的兴奋性能及时恢复,从而使电冲动能重新进入慢传导区。
Before the 1980s, cardiac electrophysiological tests mainly used pharmacological methods to verify the mechanism of certain arrhythmias in order to guide medical treatment. Later, it was recognized that antiarrhythmic drugs have their own shortcomings, which vigorously carry out non-drug treatment technology, the most prominent of which is radiofrequency ablation and implantable defibrillators. The two most important mechanisms of arrhythmia are increased self-regulation and rejuvenation. Most arrhythmias are caused by reentry, and their formation requires the involvement of two or more pathways, which are anatomically or functionally distinct from one another and are electrically and interrelated. The conduction speed of one of the paths must be slow enough to allow the excitatory performance of the other path to recover in time so that the electrical impulse kinetic energy can re-enter the slow conduction area.