Long-Term Effects of Ganglionated Plexi Ablation on Electrophysiological Characteristics and Neuron Remodeling in Target Atrial Tissues in a Canine Model

被引:17
|
作者
Wang, Ximin [1 ]
Zhang, Ming [3 ]
Zhang, Yujiao [1 ]
Xie, Xinxing [2 ]
Wang, Weizong [1 ]
Li, Zhan [1 ]
Gao, Mei [2 ]
Wang, Zhongsu [2 ]
Hou, Yinglong [2 ]
机构
[1] Shandong Univ, Sch Med, Shandong Prov Qianfoshan Hosp, Jinan 250014, Peoples R China
[2] Shandong Univ, Shandong Prov Qianfoshan Hosp, Dept Cardiol, Jinan 250014, Peoples R China
[3] Shandong Univ, Shandong Prov Qianfoshan Hosp, Intens Care Unit, Jinan 250014, Peoples R China
来源
CIRCULATION-ARRHYTHMIA AND ELECTROPHYSIOLOGY | 2015年 / 8卷 / 05期
基金
中国国家自然科学基金;
关键词
atrial fibrillation; catheter ablation; electrophysiology; GAP-43; protein; Western blotting; AUTONOMIC MECHANISM; CATHETER ABLATION; PARASYMPATHETIC INNERVATION; FIBRILLATION INDUCIBILITY; VAGAL DENERVATION; SINUS; REINNERVATION; ELECTROGRAMS; INITIATION; NODES;
D O I
10.1161/CIRCEP.114.002554
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
Background The long-term effects of ganglionated plexi ablation on electrophysiological characteristics and neuron remodeling in target atrial tissues remain unclear. Methods and Results Dogs in group 1 (control, n=8) were not subjected to ganglionated plexi ablation and observed for 1 month, and dogs in groups 2 to 4 (ablation groups, n=8 each) underwent ablation of the right-sided ganglionated plexi and observed for 1, 6, and 12 months, respectively. Atrial electrophysiological characteristics were examined before ablation, immediately and continuously after ablation. Target atrial tissues were subjected to immunohistochemical staining and Western blot analysis. Atrial effective refractory period was significantly prolonged immediately after ablation (P<0.001), and persisted for 1 month (P<0.05). Nerve densities decreased 1 month after ablation (P<0.001). These parameters reverted to preablation levels after 6 and 12 months. In the ablation groups, atrial fibrillation was induced in 5 of 8 dogs after 1 month and in all animals after 6 and 12 months. Atrial fibrillation was not observed in the control group and in the experimental groups immediately after ablation. Moreover, the expression of the growth-associated protein 43 was upregulated after ablation. Conclusions Ganglionated plexi ablation effectively prolonged atrial effective refractory period for a short period, but the long-term effects on atrial effective refractory period and the suppression of atrial fibrillation induction were not persistent. Targeted atrial neuron remodeling may be an important mechanism underlying the observed electrophysiological changes.
引用
收藏
页码:1276 / 1283
页数:8
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