نتایج جستجو برای: radiofrequency rf

تعداد نتایج: 49059  

2012
MM. Hafez MM. Abu-Elkheir M. Shokier HF. Al-Marsafawy HM. Abo-Haded M. Abo El-Maaty

THE PURPOSE OF THE STUDY Radiofrequency (RF) catheter ablation represents an important advance in the management of children with cardiac arrhythmias and has rapidly become the standard and effective line of therapy for supraventricular tachycardias (SVTs) in pediatrics. The purpose of this study was to evaluate the intermediate term follow up results of radiofrequency catheter ablation in trea...

F Zal M A Mosleh-Shirazi M Daneshmand R Zare S M J Mortazavi, Z Mostafavi-Pour

Background: Over the past few years, the rapid use of high frequency electromagnetic fields like mobile phones has raised global concerns about the negative health effects of its use. Adaptive response is the ability of a cell or tissue to better resist stress damage by prior exposure to a lesser amount of stress. This study aimed to assess whether radiofrequency radiation can induce adaptive r...

2016
Praveen Kumar Shanmugam Reddy Sumathy Tharayil Kunneth Shyam Prasad Arakali Lakshminarayana Suparna Madivalara Yallappa Ranganathan Chandrashekara Shivaswamy Kanakapura Nanjundaswamy

BACKGROUND Xanthelasma palpebrarum (XP) is a metabolic disorder involving the eyelids. Radiofrequency(RF) surgery and trichloroacetic acid (TCA) applications have been listed among the procedures for XP, but comparative studies are not available. AIM To compare the efficacy of radiofrequency surgery versus trichloroacetic acid application in the treatment of XP. SETTINGS AND DESIGN 20 conse...

2014
Anna Sannino Olga Zeni Stefania Romeo Rita Massa Giancarlo Gialanella Gianfranco Grossi Lorenzo Manti Vijayalaxmi Maria Rosaria Scarfì

The aim of this preliminary investigation was to assess whether human peripheral blood lymphocytes which have been pre-exposed to non-ionizing radiofrequency fields exhibit an adaptive response (AR) by resisting the induction of genetic damage from subsequent exposure to ionizing radiation. Peripheral blood lymphocytes from four healthy donors were stimulated with phytohemagglutinin for 24 h an...

Journal: :Medical physics 2010
Stephan Orzada Stefan Maderwald Sophia L Göricke Nina Parohl Susanne C Ladd Mark E Ladd Harald H Quick

PURPOSE Magnetic resonance imaging (MRI) of rodents can be expected to be a growing application, particularly when translatory imaging research "from mouse to man" is envisioned. 7 T high-field human whole-body MR systems provide a powerful platform for high-resolution small animal imaging. For achieving adequate spatial resolution, dedicated radiofrequency coils have to be designed to provide ...

Journal: :Brain research 2010
Shangcheng Xu Zhou Zhou Lei Zhang Zhengping Yu Wei Zhang Yuan Wang Xubu Wang Maoquan Li Yang Chen Chunhai Chen Mindi He Guangbin Zhang Min Zhong

Increasing evidence indicates that oxidative stress may be involved in the adverse effects of radiofrequency (RF) radiation on the brain. Because mitochondrial DNA (mtDNA) defects are closely associated with various nervous system diseases and mtDNA is particularly susceptible to oxidative stress, the purpose of this study was to determine whether radiofrequency radiation can cause oxidative da...

Journal: :Alimentary pharmacology & therapeutics 2008
E Coron V Sebille G Cadiot F Zerbib P Ducrotte F Ducrot P Pouderoux J Arts M Le Rhun T Piche S Bruley des Varannes J P Galmiche

BACKGROUND Radiofrequency (RF) energy delivery is an endoscopic procedure developed for the treatment of gastro-oesophageal reflux disease. AIM To compare RF and a proton pump inhibitor strategy (PPI) in PPI-dependent patients by carrying out a prospective, randomized trial. METHODS Patients with PPI-dependent typical reflux symptoms were randomly allocated to either RF or PPI regimen alone...

Journal: :Catheterization and cardiovascular interventions : official journal of the Society for Cardiac Angiography & Interventions 2005
Gruschen R Veldtman Gregory J Wilson Alejandro Peirone Amanda Hartley Marvin Estrada Gunnar Norgard Ramsey K Leung Naheed Visram Lee N Benson

Perforating radiofrequency (PRF) energy has been used to obtain percutaneous transseptal left heart access. Contrary to ablative radiofrequency (RF), myocardial tissue responses to PRF thermal injury are incompletely defined. In this study, a newly developed RF catheter system for transseptal left atrial entry was compared with conventional needle puncture. Of 15 piglets having transfemoral car...

Journal: :journal of biomedical physics and engineering 0
s m j mortazavi 1medical physics and medical engineering department, school of medicine, shiraz university of medical sciences, shiraz, z mostafavi-pour biochemistry department, medical school, shiraz university of medicinal sciences, shiraz, ir iran 3recombinant protein lسازمان های دیگر: 3recombinant protein laboratory, school of advanced medical sciences and technologies, shiraz university

background: over the past few years, the rapid use of high frequency electromagnetic fields like mobile phones has raised global concerns about the negative health effects of its use. adaptive response is the ability of a cell or tissue to better resist stress damage by prior exposure to a lesser amount of stress. this study aimed to assess whether radiofrequency radiation can induce adaptive r...

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