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radio-frequency ablation

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https://www.readbyqxmd.com/read/28012210/elimination-of-ventricular-arrhythmia-in-catecholaminergic-polymorphic-ventricular-tachycardia-by-targeting-catecholamine-sensitive-area-a-dominant-subordinate-relationship-between-origin-sites-of-bidirectional-ventricular-premature-contractions
#1
Yasuhiro Shirai, Masahiko Goya, Seiko Ohno, Minoru Horie, Shozaburo Doi, Mitsuaki Isobe, Kenzo Hirao
We report on a patient diagnosed with CPVT who underwent catheter ablation of VPCs induced by epinephrine. VPCs were classified roughly into 3 types. Type 1 and Type 2 VPCs (RBBB configuration and inferior axis) were eliminated by radio frequency applications at the left aortic sinus of Valsalva and the anterolateral papillary muscle (APM), respectively. Although no spontaneous VPCs were seen after the elimination of Type 1 and 2 VPCs, pacing resulting in capture at the APM induced type 3 VPC (RBBB configuration and superior axis) reproducibly...
December 24, 2016: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/27994333/comparative-study-of-outcome-of-duplex-ultrasound-guided-catheter-directed-foam-sclerotherapy-and-radio-frequency-ablation-in-the-management-of-great-saphenous-varicose-veins
#2
Manish Kumar Mishra, Rajesh Kumar Soni, Ravindra Singh Mohil, Ajit Sinha
Chronic venous insufficiency of lower limbs is a common problem in adults. We compared the two modalities, namely duplex ultrasound-guided, catheter-directed foam sclerotherapy (UGFS) and radio-frequency ablation (RFA), in the management of great saphenous varicose veins using clinical assessment (Venous Clinical Severity Score, Venous Disability Score) and duplex imaging. Patients presenting with great saphenous vein (GSV) varicosity due to incompetent saphenofemoral junction (SFJ) were selected and randomly assigned in each arm, i...
October 2016: Indian Journal of Surgery
https://www.readbyqxmd.com/read/27981883/varicose-vein-therapy-and-nerve-lesions
#3
Tobias Hirsch
Treating varicose veins using endovenous thermal techniques - especially laser and radio frequency ablation - has emerged as an effective alternative to open surgery with stripping and high ligation. Even though these methods are very gentle and patient-friendly, they are nevertheless accompanied by risks and side effects. Compared to open surgical therapy, the risk of damage to peripheral and motor nerves is reduced; however, it still exists as a result of heat exposure and tumescent anaesthesia. Non-thermal methods that can be applied without tumescent anaesthesia have been introduced to the market...
December 16, 2016: VASA. Zeitschrift Für Gefässkrankheiten
https://www.readbyqxmd.com/read/27966462/radio-frequency-mediated-local-thermotherapy-for-destruction-of-pancreatic-tumors-using-ni-au-core-shell-nanowires
#4
Xiaoping Hopkins, Waqas Amin Gill, Rosemarie Kringel, Guankui Wang, Jamie Hass, Suresh Acharya, Jungrae Park, In Tak Jeon, Boo Hyun An, Ji Sung Lee, Jong Eun Ryu, Rod Hill, David McIlroy, Young Keun Kim, Daniel S Choi
We present a novel method of radio frequency (RF)-mediated thermotherapy in tumors by remotely heating nickel (Ni)-gold (Au) core-shell nanowires (CSNWs). Ectopic pancreatic tumors were developed in nude mice to evaluate the thermotherapeutic effects on tumor progression. Tumor ablation was produced by RF-mediated thermotherapy via activation of the paramagnetic properties of the Ni-Au CSNWs. Histopathology demonstrated that heat generated by RF irradiation caused significant cellular death with pyknotic nuclei and nuclear fragmentation dispersed throughout the tumors...
January 20, 2017: Nanotechnology
https://www.readbyqxmd.com/read/27932994/comparative-mrna-and-microrna-profiling-during-acute-myocardial-infarction-induced-by-coronary-occlusion-and-ablation-radio-frequency-currents
#5
Eduardo T Santana, Regiane Dos Santos Feliciano, Andrey J Serra, Eduardo Brigidio, Ednei L Antonio, Paulo J F Tucci, Lubov Nathanson, Mariana Morris, José A Silva
The ligation of the left anterior descending coronary artery is the most commonly used experimental model to induce myocardial infarction (MI) in rodents. A high mortality in the acute phase and the heterogeneity of the size of the MI obtained are drawbacks recognized in this model. In an attempt to solve the problem, our group recently developed a new MI experimental model which is based on application of myocardial ablation radio-frequency currents (AB-RF) that yielded MI with homogeneous sizes and significantly reduce acute mortality...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27928789/-surgical-management-of-locally-advanced-digestive-tract-neuroendocrine-neoplasm-with-or-without-liver-metastasis
#6
Xiaosong Wang, Jiangfeng Qiu, Zhiyong Wu
Neuroendocrine tumors in the digestive tract are rare, however their incidences increased obviously for the past few years. The purpose of this paper is to elucidate the surgical management of locally advanced digestive tract neuroendocrine neoplasms(NENs) with or without liver metastasis and to discuss the present classification of gastrointestinal NENs in order to provide reference for clinicians. WHO re-classified the gastroenteropancreatic NENs in 2010, but this classification remains many questions and needs further clinical trials to answer...
November 25, 2016: Zhonghua Wei Chang Wai Ke za Zhi, Chinese Journal of Gastrointestinal Surgery
https://www.readbyqxmd.com/read/27909131/mri-appearances-of-atypical-cartilaginous-tumour-grade-i-chondrosarcoma-after-treatment-by-curettage-phenolisation-and-allografting-recommendations-for-follow-up
#7
S H M Verdegaal, C S van Rijswijk, H F C Brouwers, P D S Dijkstra, M A J van de Sande, P C W Hogendoorn, A H M Taminiau
AIMS: The purpose of this retrospective study was to differentiate between the MRI features of normal post-operative change and those of residual or recurrent disease after intralesional treatment of an atypical cartilage tumour (ACT)/grade I chondrosarcoma. PATIENTS AND METHODS: We reviewed the case notes, radiology and histology of 75 patients, who had been treated for an ACT/grade I chondrosarcoma by curettage, phenolisation and bone allografting between 1994 and 2005...
December 2016: Bone & Joint Journal
https://www.readbyqxmd.com/read/27875060/open-versus-thoracoscopic-rfa-assisted-lung-resection
#8
Anna Poupalou, Michael Kontos, Evangelos Felekouras, Apostolos Papalois, Nikolaos Kavantzas, George Agrogiannis, Fatima Yagoubi, Periklis Tomos
The purpose of this study was to evaluate Radio Frequency Ablation (RFA)-assisted lung parenchymal transection through thoracotomy and thoracoscopy. Twelve domestic pigs underwent RFA-assisted lingulectomy: six through thoracotomy (group A), and six with thoracoscopy (group B). There was no mortality, no bleeding, or air leak intra- or postoperatively in either of the groups, and no conversion to open thoracotomy in group B. Group A had longer operating period and more pleural adhesions. A barotrauma, a skin burn, and a localized infection were observed in this group...
November 22, 2016: Journal of Investigative Surgery: the Official Journal of the Academy of Surgical Research
https://www.readbyqxmd.com/read/27846343/temperature-profile-of-ex-vivo-organs-during-radio-frequency-thermal-ablation-by-fiber-bragg-gratings
#9
Giovanna Palumbo, Agostino Iadicicco, Daniele Tosi, Paolo Verze, Nicola Carlomagno, Vincenzo Tammaro, Juliet Ippolito, Stefania Campopiano
No abstract text is available yet for this article.
November 1, 2016: Journal of Biomedical Optics
https://www.readbyqxmd.com/read/27831864/3d-myocardial-elastography-in-vivo
#10
Clement Papadacci, Ethan A Bunting, Elaine Y Wan, Pierre Nauleau, Elisa E Konofagou
Strain evaluation is of major interest in clinical cardiology as it can quantify the cardiac function. Myocardial elastography, a radio-frequency (RF)-based cross-correlation method, has been developed to evaluate the local strain distribution in the heart in vivo. However, inhomogeneities such as RF ablation lesions or infarction require a three-dimensional approach to be measured accurately. In addition, acquisitions at high volume rate are essential to evaluate the cardiac strain in three dimensions. Conventional focused transmit schemes using 2D matrix arrays, trade off sufficient volume rate for beam density or sector size to image rapid moving structure such as the heart, which lowers accuracy and precision in the strain estimation...
November 1, 2016: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/27830452/fabrication-of-self-expandable-niti-thin-film-devices-with-micro-electrode-array-for-bioelectric-sensing-stimulation-and-ablation
#11
Christoph Bechtold, Rodrigo Lima de Miranda, Christoph Chluba, Eckhard Quandt
Self-expandable medical devices provide mechanical functionality at a specific location of the human body and are viable for minimal invasive procedures. Besides radiopaque markers and drug-eluting coatings, next generation self-expandable devices can be equipped with additional functionality, such as conductive and flexible electrodes, which enables chronic recording of bioelectrical signals, stimulating or ablating tissue. This promises new therapeutic options in various medical fields, among them in particular neuromodulation (e...
December 2016: Biomedical Microdevices
https://www.readbyqxmd.com/read/27793949/sorafenib-combined-with-radio-frequency-ablation-compared-with-sorafenib-alone-in-treatment-of-hepatocellular-carcinoma-invading-portal-vein-a-western-randomized-controlled-trial
#12
Antonio Giorgio, Maria Gabriella Merola, Luca Montesarchio, Francesca Merola, Bruno Santoro, Carmine Coppola, Pietro Gatti, Ferdinando Amendola, Antonella DI Sarno, Andrea Calvanese, Paolo Matteucci, Valentina Giorgio
AIM: To compare in a randomized controlled trial (RCT) 3-year survival of cirrhotic patients with hepatocellular carcinoma (HCC) accompanied by portal vein tumor thrombus (PVTT) treated with sorafenib plus percutaneous radiofrequency ablation (RFA) of both intraparenchymal HCC and PVTT (combination Group) or sorafenib alone (sorafenib-alone Group). PATIENTS AND METHODS: Ninety-nine consecutive Child A cirrhotics were randomized to receive RFA of both HCC and main portal vein tumor thrombus (MPVTT) plus sorafenib (n=49) or sorafenib alone (n=50)...
2016: Anticancer Research
https://www.readbyqxmd.com/read/27723374/comparison-of-clinical-efficacy-among-endoscopy-assisted-radio-frequency-ablation-extracorporeal-shockwaves-and-eccentric-exercises-in-treatment-of-insertional-achilles-tendinosis
#13
Min Wei, Yujie Liu, Zhongli Li, Zhigang Wang
BACKGROUND: We sought to compare clinical efficacy among endoscopy-assisted radio-frequency ablation under local anesthesia, extracorporeal shockwaves (ESWs), and eccentric exercises in treating insertional Achilles tendinosis. METHODS: In this retrospective study, 78 patients diagnosed as having unilateral insertional Achilles tendinosis were enrolled. These participants underwent endoscopy-assisted radio-frequency ablation, ESWs, and eccentric calf muscle exercises between March 1, 2006, and February 28, 2011...
October 10, 2016: Journal of the American Podiatric Medical Association
https://www.readbyqxmd.com/read/27716829/analysis-of-microstructure-of-the-cardiac-conduction-system-based-on-three-dimensional-confocal-microscopy
#14
Daniel Romero, Oscar Camara, Frank Sachse, Rafael Sebastian
The specialised conducting tissues present in the ventricles are responsible for the fast distribution of the electrical impulse from the atrio-ventricular node to regions in the subendocardial myocardium. Characterisation of anatomical features of the specialised conducting tissues in the ventricles is highly challenging, in particular its most distal section, which is connected to the working myocardium via Purkinje-myocardial junctions. The goal of this work is to characterise the architecture of the distal section of the Purkinje network by differentiating Purkinje cells from surrounding tissue, performing a segmentation of Purkinje fibres at cellular scale, and mathematically describing its morphology and interconnections...
2016: PloS One
https://www.readbyqxmd.com/read/27706179/noninvasive-imaging-of-human-atrial-activation-during-atrial-flutter-and-normal-rhythm-from-body-surface-potential-maps
#15
Zhaoye Zhou, Qi Jin, Long Yu, Liqun Wu, Bin He
BACKGROUND: Knowledge of atrial electrophysiological properties is crucial for clinical intervention of atrial arrhythmias and the investigation of the underlying mechanism. This study aims to evaluate the feasibility of a novel noninvasive cardiac electrical imaging technique in imaging bi-atrial activation sequences from body surface potential maps (BSPMs). METHODS: The study includes 7 subjects, with 3 atrial flutter patients, and 4 healthy subjects with normal atrial activations...
2016: PloS One
https://www.readbyqxmd.com/read/27688037/hydrodisplacement-of-sural-nerve-for-safety-and-efficacy-of-endovenous-thermal-ablation-for-small-saphenous-vein-incompetence
#16
Omar Rodriguez-Acevedo, Kristen E Elstner, Kui Martinic, Aaron Zea, Jenny Diaz, Rodrigo T Martins, Fernando Arduini, Alexandra Hodgkinson, Nabeel Ibrahim
BACKGROUND: Endovenous radio frequency ablation for small saphenous vein incompetence by and large appears to be superior and safer than conventional open surgery. Small saphenous vein ablation from approximately mid-calf to the point proximally where the small saphenous vein dives into the popliteal fossa is considered to be safe, as the sural nerve is in most cases separated from this segment of the small saphenous vein by the deep fascia. The outcome of the distal incompetent small saphenous vein remains unclear...
September 29, 2016: Phlebology
https://www.readbyqxmd.com/read/27682030/clinical-anatomy-of-the-cavotricuspid-isthmus-and-terminal-crest
#17
Wiesława Klimek-Piotrowska, Mateusz K Hołda, Mateusz Koziej, Jakub Hołda, Katarzyna Piątek, Kamil Tyrak, Filip Bolechała
The aim of this study was to provide useful information about the cavotricuspid isthmus (CTI) and surrounding areas morphology, which may help to plan CTI radio-frequency ablation. We examined 140 autopsied human hearts from Caucasian individuals of both sexes (29.3% females) with a mean age of 49.1±17.2 years. We macroscopically investigated the lower part of the right atrium, the CTI, the inferior vena cava ostium and the terminal crest. The paraseptal isthmus (18.5±4.0 mm) was significantly shorter than the central isthmus (p<0...
2016: PloS One
https://www.readbyqxmd.com/read/27679246/combining-paracervical-block-with-a-complete-fundal-block-significantly-reduces-patients-perception-of-pain-during-radio-frequency-endometrial-ablation-in-an-office-setting
#18
H Skensved
No abstract text is available yet for this article.
November 2015: Journal of Minimally Invasive Gynecology
https://www.readbyqxmd.com/read/27635672/treatment-of-symptomatic-neuroendocrine-tumor-syndromes-recent-advances-and-controversies
#19
Tetsuhide Ito, Lingaku Lee, Robert T Jensen
INTRODUCTION: Neuroendocrine tumors(NETs), once thought rare, are increasing in frequency in most countries and receiving increasing-attention. NETs present two-treatment problems. A proportion is aggressive and a proportion has a functional, hormone-excess-state(F-NET) each of which, must be treated. Recently, there have been many advances, well-covered in reviews/consensus papers on imaging-NETs; new, novel anti-tumor treatments and understanding their pathogenesis. However, little attention has been paid to advances in the treatment of the hormone-excess-state...
September 16, 2016: Expert Opinion on Pharmacotherapy
https://www.readbyqxmd.com/read/27628611/investigation-of-a-correlation-between-thoracic-vertebra-hyperplasia-and-relapse-in-paroxysmal-atrial-fibrillation-patients-following-extended-pulmonary-vein-isolation
#20
Tadashi Hashida, Koichiro Yoshioka, Shigetaka Kanda, Daisuke Fujibayashi, Mari Amino, Yuji Ikari
Pulmonary vein isolation (PVI) with radio-frequency catheter ablation (RFCA) is effective therapy for the patients with paroxysmal atrial fibrillation (pAF). However, it is not easy to predict relapse of pAF. Approximately 70% pAF patients were maintained sinus rhythm for 1 year after PVI in Japan. In this study, all of the cases were underwent chest computed tomography (CT) to check for the morphology and positional relationship of the left atrium. We detected relapse cases that exhibited spur formation in the thoracic vertebrae...
September 20, 2016: Tokai Journal of Experimental and Clinical Medicine
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