Objectives:1) This study sought to systematically investigate the interactions between the extrinsic and intrinsic cardiac autonomic nervous system(ANS) in modulating electrophysiological properties and atrial fibrillation(AF) initiation,including sinus node ruction,A-V conduction and the maintanence of AF adjusted by stimulating cervical vagua trunck and ablating SANFP or AVNFP for understanding the mechanism of functional interactions between cervical vagua trunck and ganglionated plexi within the intrins...