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First-in-man implantation of the retrievable and repositionable VenusA-Plus valve

World Journal of Emergency Medicine 2018年第1期9卷 64-66页

作者： Xian-bao Liu Yu-xin He Chun-hui Liu Li-han Wang Feng Gao Lei Yu Ai-qiang Dong Min-jian Kong Ji-fang Chen Yong Xu Qi-jing Zhou Min Yan Jian-an Wang Department of Cardiology the Second Affiliated Hospital Zhejiang University School of Medicine Department of Cardiovascular Surgery the Second Affiliated Hospital Zhejiang University School of Medicine Department of Anesthesiology the Second Affiliated Hospital Zhejiang University School of Medicine Department of Radiology the Second Affiliated Hospital Zhejiang University School of Medicine

BACKGROUND: No retrievable and repositionable second generation transcatheter aortic valve is available in China. Here, we report the first-in-man implantation of the retrievable and repositionable VenusA-Plus valve. METHODS: A 76-year-old patient with symptomatic severe aortic stenosis and high surgical risk(STS 13.8%) was recommended for transcatheter aortic valve replacement(TAVR) by heart valve team. Type 0 bicuspid aortic valve with asymmetric calcification was identified by dual source computed tomography, and the unfavorable anatomies increased the possibility of malposition and paravalvular leakage during TAVR. Therefore, we used the retrievable and repositionable Venus APlus valve for the ***: Transfemoral TAVR was performed under local anesthesia with sedation, and a 26-mm VenusA-Plus valve was successfully implanted. No transvalvular pressure gradient and trace paravalvular leakage were found. CONCLUSION: The successful first-in-man implantation indicates the retrievable and repositionable Venus A-Plus valve is feasible in complicated TAVR cases such as bicuspid aortic valve.

关键词： Transcatheter aortic valve replacement Venus A-Plus valve retrievable Repositionable Bicuspid aortic valve

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The correlation of multi-angle thermal infrared data and the choice of optimal view angles

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Science China Earth Sciences 2004年第6期47卷 570-576页

作者： FAN Wenjie1 & XU Xiru1,2 1.Institute of Remote Sensing and GIS of Peking University,Beijing 100871,China 2.Center of Remote Sensing and GIS of Beijing Normal University,Beijing 100875,China Institute of Remote Sensing and GIS of Peking University Beijing China Center of Remote Sensing and GIS of Beijing Normal University Beijing China

Based on the matrix formula of thermal infrared radiant system, the components temperature can be retrieved by the inversive matrix. Around the stability problem of retrieved result, the research work we did was focused on (i) the correlation of (wk,j) which is the key to affect the retrieval accuracy, (ii) a general method which can help us find the number of retriev-able parameters and evaluate the retrieval error before its performance, (iii) the choice of 搊pti-mal viewing angle group?based on the formula of absolute error propagation. The row winter wheat field was chosen as an example. The results can provide a theoretical basis for multi-angle thermal infrared remote sensing and components temperature retrieval.

关键词： components temperature retrieval, correlation, number of retrievable parameters, optimal viewing angle group.

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