双语字幕Conduction System of the Heart 心脏传导系统 The conduction system of the heart includes two areas of nodal tissue and a network of conduction fibers. Electrical impulses formed by the sinoatrial (SA) node travel on a specific pathway through these structures and tell the ventricles of the heart to contract.心脏传导系统包括 2 个结组织区域和 1 个传导纤维网络。窦房（SA）结产生的电脉冲通过这些结构，在特定路径上传导，并“告诉”心室收缩。 The process begins when the SA node generates an electrical impulse. That impulse travels through Bachmann's bundle and into the left atrium. The impulse also travels to the atrioventricular (AV) node through 3 internodal pathways. 这一过程始于 SA 结产生电脉冲。电脉冲通过 Bachmann 束传导到左心房，也通过结间通道传导到房室（AV）结。 At the AV node, the electrical impulse becomes "tied up" for a little longer than a tenth of a second. Once the impulse is released, it travels through the bundle of His in the ventricular septum. 电脉冲传导到 AV 结时有超过 0.1 s 的停顿，然后继续传导，通过室间隔内的 His 束。 Here, the impulse travels down both the left bundle branches and the right bundle branches, and is transmitted to millions of Purkinje fibers. 在这里，电脉冲沿左束支和右束支向下传导到数以万计的浦肯野纤维。 The Purkinje fibers are located in both ventricles of the heart. When the impulse arrives here, the Purkinje fibers stimulate the ventricles to contract.浦肯野纤维位于心脏的两个心室中。电脉冲传导到这里时，浦肯野纤维将刺激心室收缩。 Let's watch that again.我们再看一遍电脉冲的传导过程。 相关单词学习
Sinoatrial
①发音和释义 sin•o•a•tri•al/sainəu'eitriəl/adj. 窦房的Pertaining to the sinus venosus and the atrium of the heart. 单词 sinoatrial 由下列成分构成 hepato-（前缀）肝 +pancreatic/ˌpæŋkriˈætɪk/adj. 胰腺的
《心脏听诊教学》（课时：7） 《心脏听诊教学》持续更新中（目前更新到第7节课）......涵盖听诊区、听诊器、听诊方法，S1心音等内容，适用于临床医生，医学生，及相关人士的医学教育，课程简短，知识点精炼，高效提高学习效率。The past belongs to death, and that the future belongs to yourself. 过去属于死神，未来属于自己。戳“阅读原文”，查看全部视频课程
