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RF ablation

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https://www.readbyqxmd.com/read/29149500/ep-radiofrequency-generators-significant-offsets-between-selected-and-delivered-power
#1
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/29147788/dissociated-pulmonary-vein-activity-after-cryoballoon-ablation-and-radiofrequency-ablation-for-atrial-fibrillation-a-propensity-score-matched-analysis
#2
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/29140960/radiofrequency-procedures-to-relieve-chronic-hip-pain-an-evidence-based-narrative-review
#3
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/29138585/a-comparative-analysis-of-clinical-outcomes-and-disposable-costs-of-different-catheter-ablation-methods-for-the-treatment-of-atrioventricular-nodal-reentrant-tachycardia
#4
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/29119066/bipolar-radiofrequency-facet-ablation-of-the-lumbar-facet-capsule-an-adjunct-to-conventional-radiofrequency-ablation-for-pain-management
#5
Robert E Jacobson, Ovidiu Palea, Michelle Granville
Radiofrequency facet ablation (RFA) has been performed using the same technique for over 50 years. Except for variations in electrode size, tip shape, and change in radiofrequency (RF) stimulation parameters, using standard, pulsed, and cooled RF wavelengths, the target points have remained absolutely unchanged from the original work describing RFA for lumbar pain control. Degenerative changes in the facet joint and capsule are the primary location for the majority of lumbar segmental pathology and pain. Multiple studies show that the degenerated facet joint is richly innervated as a result of the inflammatory overgrowth of the synovium...
September 1, 2017: Curēus
https://www.readbyqxmd.com/read/29107175/entrapment-of-focal-atrial-tachycardia-using-cryoballoon-ablation-sinus-rhythm-in-the-left-atrium-and-ongoing-atrial-tachycardia-in-the-left-atrial-appendage
#6
Hikmet Yorgun, Uğur Canpolat, Banu Evranos, Kudret Aytemir
Left atrial appendage (LAA) is a well-known source of focal atrial tachycardias (AT). Although radio-frequency (RF) energy is the most commonly used technique in such cases, there was an option other than epicardial approach when RF technique fails. Cryoballoon technology is primarily developed to be used for pulmonary vein isolation (PVI). Also, there was no report regarding the isolation of LAA by using cryo-balloon in patients with focal AT. In this case, for the first time in the literature, we successfully isolated the LAA because of failed attempts of RF ablation for focal AT in whom the surface electrogram showed a sinus rhythm while arrhythmia continues inside the LAA...
October 28, 2017: Indian Pacing and Electrophysiology Journal
https://www.readbyqxmd.com/read/29101365/biomineral-nano-theranostic-agent-for-magnetic-resonance-image-guided-augmented-radiofrequency-ablation-of-liver-tumor
#7
Anusha Ashokan, Vijay Harish Somasundaram, Genekehal Siddaramana Gowd, Ida M Anna, Giridharan L Malarvizhi, Badrinathan Sridharan, Rupal B Jobanputra, Reshmi Peethambaran, A K K Unni, Shantikumar Nair, Manzoor Koyakutty
Theranostic nanoparticles based on biocompatible mineral compositions can significantly improve the translational potential of image guided cancer nano-therapy. Here, we report development of a single-phase calcium phosphate biomineral nanoparticle (nCP) with dual-mode magnetic resonance contrast (T1-T2) together with radiofrequency (RF) mediated thermal response suitable for image-guided RF ablation of cancer. The nanoparticles (NP) are engineered to provide dual MR contrast by an optimized doping concentration (4...
November 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29093616/radiofrequency-ablation-for-hepatic-hemangiomas-a-consensus-from-a-chinese-panel-of-experts
#8
REVIEW
Jun Gao, Rui-Fang Fan, Jia-Yin Yang, Yan Cui, Jian-Song Ji, Kuan-Sheng Ma, Xiao-Long Li, Long Zhang, Chong-Liang Xu, Xin-Liang Kong, Shan Ke, Xue-Mei Ding, Shao-Hong Wang, Meng-Meng Yang, Jin-Jin Song, Bo Zhai, Chun-Ming Nin, Shi-Gang Guo, Zong-Hai Xin, Jun Lu, Yong-Hong Dong, Hua-Qiang Zhu, Wen-Bing Sun
Recent studies have shown that radiofrequency (RF) ablation therapy is a safe, feasible, and effective procedure for hepatic hemangiomas, even huge hepatic hemangiomas. RF ablation has the following advantages in the treatment of hepatic hemangiomas: minimal invasiveness, definite efficacy, high safety, fast recovery, relatively simple operation, and wide applicability. It is necessary to formulate a widely accepted consensus among the experts in China who have extensive expertise and experience in the treatment of hepatic hemangiomas using RF ablation, which is important to standardize the application of RF ablation for the management of hepatic hemangiomas, regarding the selection of patients with suitable indications to receive RF ablation treatment, the technical details of the techniques, therapeutic effect evaluations, management of complications, etc...
October 21, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/29092038/results-of-the-first-investigator-initiated-randomized-clinical-trial-of-nmarqtm-pvactm-and-thoracoscopic-ablation-for-paroxysmal-atrial-fibrillation
#9
Conn Sugihara, Steve Furniss, Jonathan Hyde, Michael Lewis, Neil Sulke
Aims: To investigate the effect of minimally invasive thoracoscopic surgical ablation and nMARQ irrigated multi-electrode phased radiofrequency (RF) ablation to treat paroxysmal atrial fibrillation (AF) compared with PVAC multi-electrode phased RF ablation, with beat-to-beat device-derived Holter monitoring throughout the study duration. Methods and results: An investigator-initiated prospective trial of patients with paroxysmal AF randomized (1:1:1) to initial surgical, nMARQ or PVAC ablation...
October 30, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/29089682/ct-guided-radiofrequency-ablation-in-osteoid-osteoma-result-from-a-tertiary-cancer-centre-in-india
#10
Suyash S Kulkarni, Nitin S Shetty, Ashwin M Polnaya, Amit Janu, Suresh Kumar, Ajay Puri, Ashish Gulia, Venkatesh Rangarajan
AIMS: The aim of this study is to evaluate the clinical efficacy of computed tomography (CT)-guided radiofrequency (RF) ablation as a minimally invasive therapy for osteoid osteoma. MATERIALS AND METHODS: This is a retrospective analysis of prospectively maintained data of 43 symptomatic osteoid osteoma patients who were treated by radiofrequency ablation (RFA). Forty out of 43 patients were naive cases and underwent primary treatment for osteoid osteoma with RFA, whereas 3 patients included in the study underwent RFA for local recurrence after having undergone surgical treatment...
July 2017: Indian Journal of Radiology & Imaging
https://www.readbyqxmd.com/read/29079576/ablation-of-the-riboflavin-binding-protein-retbindin-reduces-flavin-levels-and-leads-to-progressive-and-dose-dependent-degeneration-of-rods-and-cones
#11
Ryan A Kelley, Muayyad R Al-Ubaidi, Tirthankar Sinha, Ayse M Genc, Mustafa S Makia, Larissa Ikelle, Muna I Naash
The interface between the neural retina and the retinal pigment epithelium (RPE) is critical for several processes, including visual pigment regeneration and retinal attachment to the RPE. One of its most important functions is the exchange of metabolites between the photoreceptors and RPE because photoreceptor cells have very high energy demands, largely satisfied by oxidative metabolism. The riboflavin (RF) cofactors, flavin adenine dinucleotide (FAD) and flavin mononucleotide (FMN) are two key cofactors involved in oxidative metabolism...
October 27, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29075979/second-generation-cryoballoon-ablation-for-persistent-atrial-fibrillation-an-updated-meta-analysis
#12
Hazem Omran, Klaus-Jürgen Gutleben, Stephan Molatta, Thomas Fischbach, Birgit Wellmann, Dieter Horstkotte, Britta Körber, Georg Nölker
BACKGROUND: Catheter ablation is an established treatment option for patients with symptomatic atrial fibrillation (AF). The cornerstone of AF ablation is pulmonary vein isolation (PVI). The second-generation cryoballoon (2G-CB) has shown non-inferiority to radiofrequency (RF) ablation in paroxysmal AF in several trials. Growing evidence suggests that 2G-CB is also effective in patients with persistent AF (perAF). The aim of this study was to summarize and analyze available data on safety and mid-term (≥ 12 months) efficacy of PVI using 2G-CB in patients with perAF...
October 26, 2017: Clinical Research in Cardiology: Official Journal of the German Cardiac Society
https://www.readbyqxmd.com/read/29067912/high-density-mapping-of-inappropriate-sinus-tachycardia-further-looks-into-potential-mechanisms
#13
Philippe Maury, Anne Rollin, Benjamin Monteil, Pierre Mondoly, Stefano Capellino
Inappropriate sinus tachycardia (IST) is an incompletely understood condition associating unexpectedly fast sinus rates and debilitating symptoms whose management by sinus node modification/ablation demonstrated limited long-term success. We report about a case of IST who underwent two RF procedures using high density mapping system, highlighting some possibly specific features and discussing potential mechanisms.
July 2017: Indian Pacing and Electrophysiology Journal
https://www.readbyqxmd.com/read/29045226/science-to-practice-molecular-targeted-drug-delivery-in-combination-with-radiofrequency-ablation-of-liver-cancer-a-magic-bullet
#14
Lucas Christoph Adam, Nikitha Murali, Julius Chapiro, Jean-François Geschwind
In an effort to improve the technical success rates and clinical outcomes of radiofrequency (RF) ablation, Yan et al validated the use of a tumor-penetrating peptide and thermosensitive doxorubicin (DOX)-loaded nanoparticles in combination with RF ablation in a hepatocellular carcinoma mouse model. By achieving higher chemotherapeutic drug concentrations in target lesions, fewer toxic effects, and improved survival end points in an animal tumor model, the authors conclude that superior tumor treatment with RF ablation is possible when combined with molecular-targeted drug delivery systems...
November 2017: Radiology
https://www.readbyqxmd.com/read/29044787/intracardiac-ablation-for-atrioventricular-nodal-reentry-tachycardia-using-a-6%C3%A2-mm-distal-electrode-cryoablation-catheter-prospective-multicenter-north-american-study-icy-avnrt-study
#15
Peter Wells, Marc Dubuc, George J Klein, Dan Dan, Jean-Francois Roux, Evan Lockwood, Marcio Sturmer, David Dunbar, Paul Novak, Arun Rao, Brett J Peterson, Fred Kueffer, Kenneth A Ellenbogen
INTRODUCTION: Radiofrequency (RF) ablation is effective for slow pathway ablation, but carries a risk of inadvertent AV block requiring permanent pacing. By comparison, cryoablation with a 4 mm distal electrode catheter has not been reported to cause permanent AV block but has been shown to be less effective than RF ablation. We sought to define the safety and efficacy of a 6 mm distal electrode cryoablation catheter for slow pathway ablation in patients with atrioventricular nodal reentry tachycardia (AVNRT)...
October 17, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29032589/microscopic-assessment-of-the-tissue-sparing-potential-of-radiofrequency-assisted-liver-resection-techniques-in-a-porcine-model
#16
Petros Ypsilantis, Maria Lambropoulou, Miroslav Milicevic, Predrag Bulajic, Anastasios Karayiannakis, Dimitrios Zacharoulis, Constantinos Simopoulos
BACKGROUND: The aim of the present study was to microscopically assess the tissue-sparing potential of contemporary radiofrequency-assisted liver resection (RF-LR) techniques. METHODS: Twenty-four pigs were subjected to either (1) partial hepatectomy (PH) using the sequential-coagulate-cut (SCC) technique (group SCC, n = 6) using a monopolar electrode, the technique using the bipolar electrode Habib-4X (group H, n = 6) or the "crush-clamp" technique (group CC, n = 6); or (2) sham operation (group Sham, n = 6)...
October 15, 2017: Journal of Hepato-biliary-pancreatic Sciences
https://www.readbyqxmd.com/read/29031865/a-neuropsychologist-s-view-outcome-after-rf-ablation-for-mtle
#17
REVIEW
Lenka Krámská, Jiří Lukavský, Zdeněk Vojtěch
Concern about postoperative worsening of cognitive functions after temporal lobe epilepsy surgery is an important issue. In this article we review our data on neuropsychological outcome after radiofrequency (RF) ablation of amygdalohippocampal complex (AHC). On a group level we found initial improvement in intelligence domains and unchanged memory scores one year after the surgery. During longitudinal follow-up, we found improvement in both intellectual and memory domains. This improvement was most pronounced up to two years after surgery...
October 6, 2017: Epilepsy Research
https://www.readbyqxmd.com/read/29030237/contact-force-sensing-for-ablation-of-persistent-atrial-fibrillation-a-randomized-multicenter-trial
#18
Sergio Conti, Rukshen Weerasooriya, Paul Novak, Jean Champagne, Hong Euy Lim, Laurent Macle, Yaariv Khaykin, Alfredo Pantano, Atul Verma
BACKGROUND: Impact of contact force sensing (CFS) on ablation of persistent atrial fibrillation (PeAF) is unknown. OBJECTIVE: The TOUCH AF randomized trial compared CFS guided ablation to a CFS blinded strategy. METHODS: Patients (n=128) undergoing first-time ablation for persistent AF were randomized to a CFS guided vs CFS blinded strategy. In the CFS guided procedure, operators visualized real-time force data; in the blinded procedure, force data was hidden...
October 10, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/29028863/the-future-of-non-invasive-rejuvenation-technology-devices
#19
Michael H Gold
<p>Non-invasive rejuvenation of the skin is performed regularly in many cosmetic offices. Using evidence-based medicine, we will review the various technologies being used for non-invasive rejuvenation. This includes the use of intense pulsed light (IPL), which has been thoroughly studied and shown to be quite useful for this type of rejuvenation in removing the red and brown pigments, as well as affecting collagen. Fractional lasers, both non-ablative and ablative in nature, also can show dramatic improvements in the skin and associated clinical studies are reviewed here...
June 1, 2017: Journal of Drugs in Dermatology: JDD
https://www.readbyqxmd.com/read/29028406/loading-of-mass-spectrometry-ion-trap-with-th-ions-by-laser-ablation-for-nuclear-frequency-standard-application
#20
Petr V Borisyuk, Sergey P Derevyashkin, Ksenia Y Khabarova, Nikolay N Kolachevsky, Yury Y Lebedinsky, Sergey S Poteshin, Alexey A Sysoev, Evgeny V Tkalya, Dmitry O Tregubov, Viktor I Troyan, Oleg S Vasiliev, Valery P Yakovlev, Valery I Yudin
We describe an original multisectional quadrupole ion trap aimed to realize nuclear frequency standard based on the unique isomer transition in thorium nucleus. It is shown that the system effectively operates on Th(+), Th(2+) and Th(3+) ions produced by laser ablation of metallic thorium-232 target. Laser intensity used for ablation is about 6 GW/cm(2). Via applying a bias potential to every control voltage including the RF one, we are able not only to manipulate ions within the energy range as wide as 1-500 eV but to specially adjust trap potentials in order to work mainly with ions that belong to energy distribution maximum and therefore to effectively enhance the number of trapped ions...
August 2017: European Journal of Mass Spectrometry
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