心脏传导系统解剖 Anatomy of the Conducting System The Electrical System of the Heart Bachmann' s Bundle Sinoatrial Left Bundle (SA) Branch Node Anterior Internodal Tract Middle Internodal Posterior Internodal Atrioventricular (AV) Conduction Node Right Bundle Branch Pathways 心脏传导系统接受迷走交感神经支配心脏传导系统解剖 Anatomy of the Conducting System 心脏传导系统接受迷走-交感神经支配