scholarly journals Application of Radiofrequency Ablation in Treatment of Tachyarrhythmia based on CartoUnivu and Carto3 Intelligent System (Preprint)

2020 ◽  
Author(s):  
Guoqiang Wang ◽  
Guocai Chen ◽  
Xueqin Huang ◽  
Jianbo Hu ◽  
Xuejun Yu
Keyword(s):  
Radiofrequency Ablation ◽  
Intelligent System ◽  
Paroxysmal Supraventricular Tachycardia ◽  
Ventricular Premature Beat ◽  
Cure Rate ◽  
High Cure Rate ◽  
X Ray ◽  
System P ◽  
First Choice ◽  
Better Than

BACKGROUND Background: Radiofrequency ablation has obvious advantages in the treatment of arrhythmia, like few postoperative complications, high cure rate, low recurrence rate, and small trauma, which has become the first choice for patients to treat arrhythmia. OBJECTIVE Objective: To study the X-ray dose of radiofrequency ablation in patients with paroxysmal supraventricular tachycardia (PSVT), ventricular premature beat and ventricular tachycardia (PVC/VT) arrhythmia based on CartoUnivu and Carto3 intelligent system. METHODS Methods: Radiofrequency ablation based on CartoUnivu and Carto3 system was used to treat patients with PSVT, PVC/VT arrhythmia, and the X-ray dose of thyroid, perineum, left upper arm, intrathyroid, extrathyroid, intrathoracic, extrathoracic, intraperineum, extraperineum and other parts during the treatment was analyzed. RESULTS Results: In most PSVT patients, radiofrequency ablation guided by Carto-3 system had lower X-ray dose than that of CartoUnivu. Radiofrequency ablation under the guidance of CartoUnivu was better than that of Carto3 regarding the X-ray level of most PVC/VT patients. Radiofrequency ablation under the guidance of CartoUnivu system had lower X-ray radiation for PVC/VT patients. CONCLUSIONS Conclusions: CartoUnivu system and Carto3 system can guide the precise treatment of complex arrhythmia, have a high success rate and better safety, can significantly reduce the X-ray exposure time and dose received by patients and operators, and the risk of X-ray related damage is significantly reduced, which is worth promoting. CLINICALTRIAL

Application and Evaluation of a Manikin with a Multimedia System for Preclinical Dental Medicine Training (Preprint)

2020 ◽  
Author(s):  
Yi Yang ◽  
Wei Zhang ◽  
Jia Qing ◽  
Zhi Li
Keyword(s):  
Good Alternative ◽  
Multimedia System ◽  
Cavity Preparation ◽  
System P ◽  
Final Questionnaire ◽  
Crown Preparation ◽  
Medicine Education ◽  
Real Clinical Practice ◽  
Better Than ◽  
Preclinical Training

BACKGROUND Preclinical training on manikins is a key component of dental medicine education. Preclinical practice on traditional manikins and real clinical practice shows massive differences. Specifically, preclinical training on traditional manikins is inefficient. OBJECTIVE The aim of this study is to describe a manikin with a multimedia system and evaluate its effectiveness in preclinical dentistry training. METHODS A total of 159 students participated in this study. Amongst these students, 80 used traditional manikins (Group TM) for preclinical practices, including cavity preparation and full-crown preparation, and 79 used a manikin with a multimedia system (Group MM). The cavity preparation scores and full-crown preparation grades of the two groups were compared. The students and teachers completed a final questionnaire survey to evaluate their experience of preclinical practices using the manikin with a multimedia system. RESULTS Group MM performed better than Group TM in the preclinical practices of cavity preparation and full-crown preparation. The final questionnaire results indicated that students in Group MM were satisfied with the clarity, simulation, helpfulness in mastering operation points quickly and improvement in operation proficiency provided by the manikin with a multimedia system. The teachers were satisfied with the teaching effect of the manikin with a multimedia system and had a high opinion of the students’ mastery. CONCLUSIONS The results of this study indicated that manikins with a multimedia system are a good alternative traditional manikins in preclinical dentistry training.

scholarly journals Structural and spectral properties of a non-classical C58 isomer and its fluorinated derivatives in theory

RSC Advances ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 1472-1481
Author(s):  
Xiaoxi Song ◽  
Renfeng Mao ◽  
Ziwei Wang ◽  
Jiayuan Qi
Keyword(s):  
Electronic Structure ◽  
Spectral Properties ◽  
X Ray ◽  
System P ◽  
Fluorinated Derivatives

The X-ray spectra have good isomer dependence and give a comprehensive insight of the electronic structure of the system.

Taking Peritoneal Dialysis beyond the Year 2000

1999 ◽  
Vol 19 (3_suppl) ◽  
pp. 35-42 ◽  
Author(s):  
Ram Gokal
Keyword(s):  
Peritoneal Dialysis ◽  
Peritoneal Membrane ◽  
Membrane Function ◽  
Fluid Removal ◽  
The Past ◽  
First Choice ◽  
Year 2000 ◽  
Economic Considerations ◽  
Appropriate Prescription ◽  
Better Than

Over the past 25 years, peritoneal dialysis (PD) has steadily improved so that now its outcomes, in the form of patient survival, are equivalent to, and at times better than, those for hemodialysis. We now have a better understanding of the pathophysiology of peritoneal membrane function and damage and the importance of appropriate prescription to meet agreed-upon targets of solute and fluid removal. In the next millennium, greater emphasis will be put on prescription setting and subsequent monitoring. This will entail an increase in automated PD, especially for lifestyle reasons as well as for patients with a hyperpermeable peritoneal membrane. To improve outcomes, dialysis should be started earlier than is currently the case. It is easy to do this with PD, where an incremental approach is made easier by the introduction of icodextrin for long-dwell PD. In the future, solutions will be tailored to be more biocompatible and to provide improved nutrition and better cardiovascular outcomes. Finally, economic considerations favor PD, which is cheaper than in-centre hemodialysis. Thus, for many, PD has become a first-choice therapy, and with further improvements this trend will continue.

scholarly journals ESA’s X-Ray Astronomy Mission, XMM

1990 ◽  
Vol 123 ◽  
pp. 129-140
Author(s):  
B.G. Taylor ◽  
A. Peacock
Keyword(s):  
Resolving Power ◽  
Science Program ◽  
Eccentric Orbit ◽  
Ccd Cameras ◽  
Optical Telescope ◽  
X Ray ◽  
Medium Resolution ◽  
Reflection Gratings ◽  
Better Than

AbstractESA’s X-ray Astronomy Mission, XMM, scheduled for launch in 1998, is the second of four cornerstones of ESA’s long term science program Horizon 2000. Covering the range from about 0.1 to 10 keV, it will provide a high throughput of 5000 cm2 at 7 keV with three independant telescopes, and have a spatial resolution better than 30 arcsec. Broadband spectrophotometry is provided by CCD cameras while reflection gratings provide medium resolution spectroscopy (resolving power of about 400) in the range 0.3–3 keV. Long uninterrupted observations will be made from the 24 hr period, highly eccentric orbit, reaching a sensitivity approaching 10−15 erg cm−2 s−1 in one orbit. A 30 cm UV/optical telescope is bore-sighted with the x-ray telescopes to provide simultaneous optical counterparts to the numerous serendipitous X-ray sources which will be detected during every observation.

Influence of High Current Pulsed Electron Beam Irradiation on Ni-P Electroless Plating

2011 ◽  
Vol 299-300 ◽  
pp. 77-81
Author(s):  
Yang Xu ◽  
Sheng Zhi Hao ◽  
Xiang Dong Zhang ◽  
Min Cai Li ◽  
Chuang Dong
Keyword(s):  
Electroless Plating ◽  
Electron Beam Irradiation ◽  
Xrd Analysis ◽  
High Current ◽  
X Ray Diffraction ◽  
X Ray ◽  
Pulsed Electron Beam ◽  
6063 Aluminum Alloy ◽  
Pre Treatment ◽  
Better Than

The surface irradiation of 6063 aluminum alloy by high current pulsed electron was conducted with the aim of replacing the complicated pre-treatment in the processes of electroless plating. To explore the microstructure changes, optical metallography, SEM (scanning electron microscope), XRD (X-ray diffraction) analyses were carried out, and the sliding tests were used for the detection of wear resistance. It was concluded that the HCPEB irradiation could replace the pre-treatment of aluminum substrate as required in conventional electroless plating with a decreased surface roughness of Ni-P alloy plating layer. The plates exhibited an amorphous microstructure as demonstrated by XRD analysis. The plates, produced with the routine of HCPEB irradiation, activation and electroless plating possess, also exhibited good quality, even better than that of conventional electroless plating technique.

scholarly journals Green Synthesis of Feather-Shaped MoS2/CdS Photocatalyst for Effective Hydrogen Production

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Yang Liu ◽  
Hongtao Yu ◽  
Xie Quan ◽  
Shuo Chen
Keyword(s):  
Electron Microscopy ◽  
Hydrogen Production ◽  
Photoelectron Spectroscopy ◽  
Diffuse Reflectance ◽  
Sulfur Source ◽  
X Ray ◽  
Transmission Electron ◽  
Microscopy Images ◽  
Effective Hydrogen ◽  
Better Than

MoS2/CdS photocatalyst was fabricated by a hydrothermal method for H2production under visible light. This method used low toxic thiourea as a sulfur source and was carried out at 200°C. Thus, it was better than the traditional methods, which are based on an annealing process at relatively high temperature (above 400°C) using toxic H2S as reducing agent. Scanning electron microscopy and transmission electron microscopy images showed that the morphologies of MoS2/CdS samples were feather shaped and MoS2layer was on the surface of CdS. The X-ray photoelectron spectroscopy testified that the sample was composed of stoichiometric MoS2and CdS. The UV-vis diffuse reflectance spectra displayed that the loading of MoS2can enhance the optical absorption of MoS2/CdS. The photocatalytic activity of MoS2/CdS was evaluated by producing hydrogen. The hydrogen production rate on MoS2/CdS reached 192 μmol·h−1. This performance was stable during three repeated photocatalytic processes.

scholarly journals Purification, crystallization and preliminary X-ray diffraction analysis of a hydroxycinnamoyl-CoA shikimate/quinate hydroxycinnamoyltransferase (HCT) fromCoffea canephorainvolved in chlorogenic acid biosynthesis

2012 ◽  
Vol 68 (7) ◽  
pp. 824-828 ◽  
Author(s):  
Laura A. Lallemand ◽  
James G. McCarthy ◽  
Sean McSweeney ◽  
Andrew A. McCarthy
Keyword(s):  
Structural Data ◽  
Coffea Canephora ◽  
Molecular Replacement ◽  
X Ray Diffraction ◽  
X Ray ◽  
Cell Parameters ◽  
Key Enzyme ◽  
Substrate Specifities ◽  
Drop Technique ◽  
Better Than

Chlorogenic acids (CGAs) are a group of soluble phenolic compounds that are produced by a variety of plants, includingCoffea canephora(robusta coffee). The last step in CGA biosynthesis is generally catalysed by a specific hydroxycinnamoyl-CoA quinate hydroxycinnamoyltransferase (HQT), but it can also be catalysed by the more widely distributed hydroxycinnamoyl-CoA shikimate/quinate hydroxycinnamoyltransferase (HCT). Here, the cloning and overexpression of HCT fromC. canephorainEscherichia colias well as its purification and crystallization are presented. Crystals were obtained by the sitting-drop technique at 293 K and X-ray diffraction data were collected on the microfocus beamline ID23-2 at the ESRF. The HCT crystals diffracted to better than 3.0 Å resolution, belonged to space groupP42212 with unit-cell parametersa=b= 116.1,c= 158.9 Å and contained two molecules in the asymmetric unit. The structure was solved by molecular replacement and is currently under refinement. Such structural data are needed to decipher the molecular basis of the substrate specifities of this key enzyme, which belongs to the large plant acyl-CoA-dependent BAHD acyltransferase superfamily.

Sign in / Sign up

Export Citation Format

Share Document