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Wang Z, Chen S, Zhou T, Su L, Ling Z, Fan J, Chen W, Du H, Lu J, Xu Y, Tan Z, Yang H, Hu X, Li C, Yan X, Hu G, Liu C, Yin Y. Comparison of Saline-Irrigated Catheter vs. Temperature-Controlled Catheter for Renal Denervation in a Canine Model. Am J Hypertens 2015; 28:1434-43. [PMID: 25934968 DOI: 10.1093/ajh/hpv051] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2014] [Accepted: 12/30/2014] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND The effectiveness of catheter-based renal denervation (RDN) remains controversial. Although the reasons for this have not yet been elucidated, ineffective denervation appears to be an important factor. The present study aimed to investigate the difference in RDN between a saline-irrigated catheter (SIC) and a temperature-controlled catheter (TCC). METHODS Dogs (n = 6) from the Kunming province in Chinese were ablated; the SIC was introduced into the right renal artery, while the TCC was introduced into the left renal artery. After 6 months, histopathology and renal angiography were performed, and the change in neural density was evaluated using morphometric software. The average values of heart rate (HR), blood pressure (BP), and catecholamine metabolites were assessed at baseline and follow-up. RESULTS Histopathology showed nerve demyelination and denaturation, as well as interstitial hyperplasia, although these changes were more pronounced when the SIC was used. The change in neural density was greater and ablation was deeper when the SIC was used. Intimal hyperplasia was greater when the TCC was used, whereas medial hyperplasia was greater when the SIC was used. A trend toward a decrease in HR, BP, metanephrine, and normetanephrine between baseline and follow-up was observed. CONCLUSIONS Our findings suggest that SIC ablation results in more extensive neural degeneration, deeper penetration, and less extensive intimal hyperplasia than TCC ablation for RDN.
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Affiliation(s)
- Zhenglong Wang
- Department of Cardiology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | | | - Tingquan Zhou
- Department of Cardiology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Li Su
- Department of Cardiology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Zhiyu Ling
- Department of Cardiology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Jinqi Fan
- Department of Cardiology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Weijie Chen
- Department of Cardiology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Huaan Du
- Department of Cardiology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Jiayi Lu
- Department of Cardiology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Yanping Xu
- Department of Cardiology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Zhen Tan
- Department of Cardiology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Hanxuan Yang
- Department of Cardiology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Xinyu Hu
- Department of Cardiology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Chengzhi Li
- Department of Cardiology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Xue Yan
- Department of Cardiology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Guangxin Hu
- Department of Cardiology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Chang Liu
- Department of Cardiology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Yuehui Yin
- Department of Cardiology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China;
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