keyword
MENU ▼
Read by QxMD icon Read
search

radiofrequence

keyword
https://www.readbyqxmd.com/read/29150914/navigating-the-clinical-translation-of-medical-devices-the-case-of-radiofrequency-ablation
#1
Abdel Armaiz Flores, Marianna L Oppenheimer Velez, Scott M Thompson, Anthony J Windebank, Alexandra J Greenberg-Worisek
No abstract text is available yet for this article.
November 18, 2017: Clinical and Translational Science
https://www.readbyqxmd.com/read/29149500/ep-radiofrequency-generators-significant-offsets-between-selected-and-delivered-power
#2
Felix Bourier, Bernhard Schwarz, Amir Brkic, Lara Wolf, Verena Semmler, Marc Kottmaier, Elena Risse, Marta Telishevska, Stephanie Brooks, Sarah Lengauer, Marielouise Kornmayer, Katharina Koch-Büttner, Florian Berger, Gabriele Hessling, Isabel Deisenhofer, Tilko Reents
INTRODUCTION: For radiofrequency ablation, the EP Shuttle®, Ampere®, and SmartAblate® generator models are most frequently used in clinical practice. The aim of this study was to assess the correlation between selected and delivered RF power for different generators. METHODS AND RESULTS: In an experimental setup, ablation catheters were connected to the EP Shuttle®, Ampere®, and SmartAblate® generators. The power delivered by the generators was measured using a current converter and an oscilloscope...
November 17, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29148897/oxidative-stress-response-in-sh-sy5y-cells-exposed-to-short-term-1800%C3%A2-mhz-radiofrequency-radiation
#3
Ana Marija Marjanovic Cermak, Ivan Pavicic, Ivancica Trosic
The exact mechanism that could explain the effects of radiofrequency (RF) radiation exposure at non-thermal level is still unknown. Increasing evidence suggests a possible involvement of reactive oxygen species (ROS) and development of oxidative stress. To test the proposed hypothesis, human neuroblastoma cells (SH-SY5Y) were exposed to 1800 MHz short-term RF exposure for 10, 30 and 60 minutes. Electric field strength within Gigahertz Transverse Electromagnetic cell (GTEM) was 30 V m(-1) and specific absorption rate (SAR) was calculated to be 1...
November 17, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29148092/an-inductively-coupled-ultra-thin-flexible-and-passive-rf-resonator-for-mri-marking-and-guiding-purposes-clinical-feasibility
#4
Akbar Alipour, Sayim Gokyar, Oktay Algin, Ergin Atalar, Hilmi Volkan Demir
PURPOSE: The purpose of this study is to develop a wireless, flexible, ultra-thin, and passive radiofrequency-based MRI resonant fiducial marker, and to validate its feasibility in a phantom model and several body regions. METHODS: Standard microfabrication processing was used to fabricate the resonant marker. The proposed marker consists of two metal traces in the shape of a square with an edge length of 8 mm, with upper and lower traces connected to each other by a metalized via...
November 16, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/29147788/dissociated-pulmonary-vein-activity-after-cryoballoon-ablation-and-radiofrequency-ablation-for-atrial-fibrillation-a-propensity-score-matched-analysis
#5
Kenichi Tokutake, Michifumi Tokuda, Seiichiro Matsuo, Ryota Isogai, Kenichi Yokoyama, Mika Kato, Ryohsuke Narui, Shinichi Tanigawa, Seigo Yamashita, Satoru Miyanaga, Michihiro Yoshimura, Teiichi Yamane
Cryoballoons (CBs) have proven to be effective for achieving pulmonary vein isolation (PVI) in patients with atrial fibrillation (AF). Dissociated PV activity (DPVA) after successful radiofrequency PVI is sometimes observed inside the PV and has been found to prove the achievement of electrical disconnection from the left atrium. However, little is known about the incidence or characteristics of DPVA after CB-PVI. The aim of this study was to compare the incidence and characteristics of DPVA in patients undergoing CB and radiofrequency (RF) ablation for AF...
November 17, 2017: Heart and Vessels
https://www.readbyqxmd.com/read/29147016/observation-of-dielectric-universalities-in-albumin-cytochrome-c-and-shewanella-oneidensis-mr-1-extracellular-matrix
#6
K A Motovilov, M Savinov, E S Zhukova, A A Pronin, Z V Gagkaeva, V Grinenko, K V Sidoruk, T A Voeikova, P Yu Barzilovich, A K Grebenko, S V Lisovskii, V I Torgashev, P Bednyakov, J Pokorný, M Dressel, B P Gorshunov
The electrodynamics of metals is well understood within the Drude conductivity model; properties of insulators and semiconductors are governed by a gap in the electronic states. But there is a great variety of disordered materials that do not fall in these categories and still respond to external field in an amazingly uniform manner. At radiofrequencies delocalized charges yield a frequency-independent conductivity σ 1(ν) whose magnitude exponentially decreases while cooling. With increasing frequency, dispersionless conductivity starts to reveal a power-law dependence σ 1(ν)∝ν (s) with s < 1 caused by hopping charge carriers...
November 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29145303/epicardial-radiofrequency-catheter-ablation-of-brugada-syndrome-with-electrical-storm-during-ventricular-fibrillation-a-case-report
#7
Shufen Jiang, Xiaomeng Yin, Chang Dong, Yunlong Xia, Jinqiu Liu
RATIONALE: Brugada syndrome (BrS) is characterized by ST segment elevation at the J point ≥2 mm in the right precordial electrocardiogram (ECG) leads, in the absence of structural heart disease, electrolyte disturbances, or ischemia. It is a well-described cause of sudden death in young patients, especially in the age of between 30 and 40 years old. Here, we reported an unusual case of electrical storm (ES) of ventricular fibrillation (VF) caused by BrS with complete right bundle-branch block (CRBBB) in a 75-year-old male patient...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29145298/small-cell-lung-cancer-treated-by-radiofrequency-ablation-a-case-report
#8
Guo-Qiang Song, Fei Chen, Farong Zang, Huoquan Lu, Bin Lin
RATIONALE: The morbidity and mortality of small cell lung cancer (SCLC), an uncommon malignancy of the lung, remain high. Radiofrequency ablation (RFA) creates heat to destroy cancer cells and is usually used to treat non-SCLC, but not SCLC. PATIENT CONCERNS: An 85-year-old male presented with a 2-month history of a productive cough with white phlegm and a 2-day history of hemoptysis. Chest computed tomography revealed a mass in the right lower lobe. DIAGNOSES: An excision biopsy of the mass showed SCLC...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29145005/assessment-of-long-term-spatio-temporal-radiofrequency-electromagnetic-field-exposure
#9
Sam Aerts, Joe Wiart, Luc Martens, Wout Joseph
As both the environment and telecommunications networks are inherently dynamic, our exposure to environmental radiofrequency (RF) electromagnetic fields (EMF) at an arbitrary location is not at all constant in time. In this study, more than a year's worth of measurement data collected in a fixed low-cost exposimeter network distributed over an urban environment was analysed and used to build, for the first time, a full spatio-temporal surrogate model of outdoor exposure to downlink Global System for Mobile Communications (GSM) and Universal Mobile Telecommunications System (UMTS) signals...
November 13, 2017: Environmental Research
https://www.readbyqxmd.com/read/29143901/combined-vertebral-augmentation-and-radiofrequency-ablation-in-the-management-of-spinal-metastases-an-update
#10
REVIEW
Ning Mao Kam, Julian Maingard, Hong Kuan Kok, Dinesh Ranatunga, Duncan Brooks, William C Torreggiani, Peter L Munk, Michael J Lee, Ronil V Chandra, Hamed Asadi
Spinal metastases are the most commonly encountered tumour of the spine, occurring in up to 40% of patients with cancer. Each year, approximately 5% of cancer patients will develop spinal metastases. This number is expected to increase as the life expectancy of cancer patients increases. Patients with spinal metastases experience severe and frequently debilitating pain, which often decreases their remaining quality of life. With a median survival of less than 1 year, the goals of treatment in spinal metastases are reducing pain, improving or maintaining level of function and providing mechanical stability...
November 16, 2017: Current Treatment Options in Oncology
https://www.readbyqxmd.com/read/29143352/assessment-of-exposure-to-radio-frequency-electromagnetic-fields-from-smart-utility-meters-in-gb-part-ii-numerical-assessment-of-induced-sar-within-the-human-body
#11
Muhammad R A Qureshi, Yasir Alfadhl, Xiaodong Chen, Azadeh Peyman, Myron Maslanyj, Simon Mann
Human body exposure to radiofrequency electromagnetic waves emitted from smart meters was assessed using various exposure configurations. Specific energy absorption rate distributions were determined using three anatomically realistic human models. Each model was assigned with age- and frequency-dependent dielectric properties representing a collection of age groups. Generalized exposure conditions involving standing and sleeping postures were assessed for a home area network operating at 868 and 2,450 MHz...
November 16, 2017: Bioelectromagnetics
https://www.readbyqxmd.com/read/29142590/birdcage-volume-coils-and-magnetic-resonance-imaging-a-simple-experiment-for-students
#12
Dwight E Vincent, Tianhao Wang, Thalia A K Magyar, Peni I Jacob, Richard Buist, Melanie Martin
Background: This article explains some simple experiments that can be used in undergraduate or graduate physics or biomedical engineering laboratory classes to learn how birdcage volume radiofrequency (RF) coils and magnetic resonance imaging (MRI) work. For a clear picture, and to do any quantitative MRI analysis, acquiring images with a high signal-to-noise ratio (SNR) is required. With a given MRI system at a given field strength, the only means to change the SNR using hardware is to change the RF coil used to collect the image...
2017: Journal of Biological Engineering
https://www.readbyqxmd.com/read/29141040/medical-therapy-versus-radiofrequency-endometrial-ablation-in-the-initial-treatment-of-heavy-menstrual-bleeding-itom-trial-a-clinical-and-economic-analysis
#13
Abimbola O Famuyide, Shannon K Laughlin-Tommaso, Sherif A Shazly, Kirsten Hall Long, Daniel M Breitkopf, Amy L Weaver, Michaela E McGree, Sherif A El-Nashar, Maureen A Lemens, Matthew R Hopkins
BACKGROUND: Radiofrequency endometrial ablation (REA) is currently a second line treatment in women with heavy menstrual bleeding (MHB) if medical therapy (MTP) is contraindicated or unsatisfactory. Our objective is to compare the effectiveness and cost burden of MTP and REA in the initial treatment of HMB. METHODS: We performed a randomized trial at Mayo Clinic Rochester, Minnesota. The planned sample size was 60 patients per arm. A total of 67 women with HMB were randomly allocated to receive oral contraceptive pills (Nordette ®) or Naproxen (Naprosyn®) (n = 33) or REA (n = 34)...
2017: PloS One
https://www.readbyqxmd.com/read/29140962/anatomic-study-of-innervation-of-the-anterior-hip-capsule-implication-for-image-guided-intervention
#14
Anthony J Short, Jessi Jo G Barnett, Michael Gofeld, Ehtesham Baig, Karen Lam, Anne M R Agur, Philip W H Peng
BACKGROUND AND OBJECTIVES: The purpose of this cadaveric study was to determine the pattern of anterior hip capsule innervation and the associated bony landmarks for image-guided radiofrequency denervation. METHODS: Thirteen hemipelvises were dissected to identify innervation of the anterior hip capsule. The femoral (FN), obturator (ON), and accessory obturator (AON) nerves were traced distally, and branches supplying the anterior capsule documented. The relationships of the branches to bony landmarks potentially visible with ultrasound were identified...
November 14, 2017: Regional Anesthesia and Pain Medicine
https://www.readbyqxmd.com/read/29140960/radiofrequency-procedures-to-relieve-chronic-hip-pain-an-evidence-based-narrative-review
#15
Anuj Bhatia, Yasmine Hoydonckx, Philip Peng, Steven P Cohen
BACKGROUND AND OBJECTIVES: Chronic hip pain from osteoarthritis and other degenerative conditions is a common problem. A few publications have recently reported analgesic success of radiofrequency (RF) procedures on nerves innervating the hip, but interpretation is hampered by lack of clarity regarding indications, clinical protocols, anatomic targets, and longevity of benefit from RF procedures. METHODS: We reviewed the following medical literature databases for publications on RF procedures on the hip joint for chronic pain: MEDLINE, EMBASE, Cochrane Central Register of Controlled Trials, Cochrane Database of Systematic Reviews, and Google Scholar through February 28, 2017...
November 14, 2017: Regional Anesthesia and Pain Medicine
https://www.readbyqxmd.com/read/29140869/rhinophyma-a-treatment-review
#16
Caitlin Fink, Jeffrey Lackey, Donald J Grande
BACKGROUND: Rhinophyma is the overgrowth of sebaceous glands in nasal tissue and its etiology unclear. Without treatment, rhinophyma can be progressive and cause concern both with respect to function and cosmesis. OBJECTIVE: The objective of this work is to describe treatment options for rhinophyma and their respective risks and benefits. MATERIALS AND METHODS: A PubMed search was performed to include the terms "rhinophyma" and "treatment...
November 14, 2017: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
https://www.readbyqxmd.com/read/29138585/a-comparative-analysis-of-clinical-outcomes-and-disposable-costs-of-different-catheter-ablation-methods-for-the-treatment-of-atrioventricular-nodal-reentrant-tachycardia
#17
Adam E Berman, Harold Rivner, Robin Chalkley, Vahé Heboyan
Background: Catheter ablation of atrioventricular nodal reentrant tachycardia (AVNRT) is a commonly performed electrophysiology (EP) procedure. Few data exist comparing conventional (CONV) versus novel ablation strategies from both clinical and direct cost perspectives. We sought to investigate the disposable costs and clinical outcomes associated with three different ablation methodologies used in the ablation of AVNRT. Methods: We performed a retrospective review of AVNRT ablations performed at Augusta University Medical Center from 2006 to 2014...
2017: ClinicoEconomics and Outcomes Research: CEOR
https://www.readbyqxmd.com/read/29138435/effects-of-gsm-and-umts-mobile-telephony-signals-on-neuron-degeneration-and-blood-brain-barrier-permeation-in-the-rat-brain
#18
Florence Poulletier de Gannes, Hiroshi Masuda, Bernard Billaudel, Emmanuelle Poque-Haro, Annabelle Hurtier, Philippe Lévêque, Gilles Ruffié, Murielle Taxile, Bernard Veyret, Isabelle Lagroye
Blood-brain barrier (BBB) permeation and neuron degeneration were assessed in the rat brain following exposure to mobile communication radiofrequency (RF) signals (GSM-1800 and UMTS-1950). Two protocols were used: (i) single 2 h exposure, with rats sacrificed immediately, and 1 h, 1, 7, or 50 days later, and (ii) repeated exposures (2 h/day, 5 days/week, for 4 weeks) with the effects assessed immediately and 50 days after the end of exposure. The rats' heads were exposed at brain-averaged specific absorption rates (BASAR) of 0...
November 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29136964/does-surgical-resection-provide-better-outcomes-than-radiofrequency-ablation-in-patients-with-bclc-very-early-stage-hepatocellular-carcinoma
#19
Chuan Li, Tian-Fu Wen
No abstract text is available yet for this article.
December 2017: Annals of Surgery
https://www.readbyqxmd.com/read/29136152/concomitant-thoracoscopic-surgery-for-solitary-pulmonary-nodule-and-atrial-fibrillation
#20
Rongxin Lu, Ju Mei, Dongfang Zhao, Zhaolei Jiang, Haibo Xiao, Mingsong Wang, Nan Ma
OBJECTIVES: The incidence of both solitary pulmonary nodules (SPN) and non-valvular atrial fibrillation (NVAF) has increased over the past decade. We performed concomitant video-assisted thoracoscopic surgery with modified epicardial radiofrequency ablation procedure for NVAF and SPN resection. METHODS: Sixteen patients (7 men, mean age 62.6 ± 11.2 years) with SPN and NVAF underwent this procedure. Of these patients, 10 had paroxysmal atrial fibrillation and 6 persistent atrial fibrillation...
November 10, 2017: Interactive Cardiovascular and Thoracic Surgery
keyword
keyword
99730
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"