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当房室间不存在具有功能的异常连接纤维时,房室连接处便是心房冲动传到心室的唯一桥梁。房室连接处可分为由心房向房室结的交接处、房室结本身和希氏束的穿入部分。房室连接处任何一点的完全横断即产生房室传导阻滞;当希氏-浦顷野系统正常时,刺激房室连接处将引起一个窄的QRS波。房室连接处的电生理学功能主要是传导。但此外,它还具有内在的自律性,当近端组织不能形成冲动或传导发生障碍时,它可作为一个辅助起搏点。在病理情况下,连接处可作为一个异位起搏点或折返点。
When the room does not exist with abnormal connectivity fibers, the atrioventricular junction is the only bridge of atrial impulse to the ventricle. Atrioventricular junction can be divided into the junction from the atrium to the atrioventricular node, atrioventricular node and His bundle penetration part. A complete transection of the atrioventricular junction produces atrioventricular block, and when the Histi-Uran system is normal, stimulating the atrioventricular junction will cause a narrow QRS wave. Atrioventricular junction Department of electrophysiology is mainly conductive. But in addition, it has an inherent self-discipline that can be used as an accessory pacemaker when the proximal tissue can not develop impulsivity or conduction impairment. In pathological conditions, the junction can be used as an ectopic pacemaker or reentry point.