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RF ablation

Payam Safavi-Naeini, Dreema Zafar-Awan, Hongjian Zhu, Gerardo Zablah, Anand V Ganapathy, Abdi Rasekh, Mohammad Saeed, Joanna Esther Molina Razavi, Mehdi Razavi
INTRODUCTION: Current methods for measuring voltage during radiofrequency (RF) ablation (RFA) necessitate turning off the ablation catheter. If voltage could be accurately read without signal attenuation during RFA, turning off the catheter would be unnecessary, allowing continuous ablation. We evaluated the accuracy of the Thermocool SMARTTOUCH catheter for measuring voltage while RF traverses the catheter. METHODS AND RESULTS: We studied 26 patients undergoing RFA for arrhythmias...
October 20, 2016: Journal of Cardiovascular Electrophysiology
Artur Baszko, Wojciech Telec, Piotr Kałmucki, Piotr Iwachów, Karol Kochman, Radosław Szymański, Jan Kłopocki, Stefan Ożegowski, Andrzej Szyszka, Tomasz Siminiak
Bipolar radiofrequency (RF) ablation is effective in treatment of ventricular tachycardia originating from thick interventricular septum. The RF generator and CARTO system can be used to precisely and safely perform ablation. Standard ablation catheter can be used with indifferent ablation electrode connected to the electrode receptacle in RF generator with custom-made cable.
October 2016: Clinical Case Reports
Bingbo Hou, Lihui Zheng, Guodong Niu, Lingmin Wu, Yu Qiao, Wei Sun, Ligang Ding, Gang Chen, Shu Zhang, Reginald Liew, Yan Yao
AIMS: This study was aimed to report the characteristics and treatment of ventricular tachycardia (VT) following surgical treatment of pulmonary stenosis with intact ventricular septum. METHODS AND RESULTS: Five patients underwent radiofrequency catheter ablation for sustained monomorphic left bundle branch block (LBBB) type VT who previously underwent surgical treatment of pulmonary stenosis. Except stimulation, voltage and activation mapping was performed using three-dimensional (3D) electro-anatomic mapping and ablation was applied accordingly...
October 12, 2016: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
María-Victoria Alvarez-Sánchez, Bertrand Napoléon
Most pancreatic cancers and extrahepatic cholangiocarcinomas are unresectable at the time of diagnosis, and even in case of a resectable cancer, for elderly or patients with coexistent comorbidities, surgery is not an option. Current treatment alternatives in these scenarios are very limited. Biliary stenting with self-expanding metal stents (SEMS) is the mainstay palliative treatment of biliary obstruction due to unresectable pancreatic cancer or cholangiocarcinoma. Nevertheless, more than 50% of SEMS become occluded after 6 mo due to tumour over- and ingrowth, leading to hospital readmissions and reinterventions that significantly impair quality of life...
October 7, 2016: World Journal of Gastroenterology: WJG
Andrea Radinovic, Patrizio Mazzone, Giovanni Landoni, Eustachio Agricola, Damiano Regazzoli, Paolo Della Bella
BACKGROUND: Left atrial catheterization through transseptal puncture is frequently performed in cardiac catheterization procedures. Appropriate transseptal puncture is critical to achieve procedural success. AIMS: The aim of the study is to evaluate the feasibility of selective transseptal punctures, using a modified radiofrequency (RF) transseptal needle and transesophageal echocardiography (TEE), in different types of procedures that require specific sites of left atrial catheterization...
October 2016: Annals of Cardiac Anaesthesia
Giuseppe Stabile, Matteo Anselmino, Ezio Soldati, Ermengildo De Ruvo, Francesco Solimene, Assunta Iuliano, Luigi Sciarra, Maria Grazia Bongiorni, Leonardo Calò, Fiorenzo Gaita
PURPOSE: Left atrial volume (LA) and pulmonary vein (PV) anatomy may potentially relate to technical challenges in achieving stable and effective catheter position in case of atrial fibrillation (AF) ablation by means of "one-shot" catheters. The aim of this study was to investigate whether LA volume and PV anatomy, evaluated by computed tomography (CT) or magnetic resonance (MR) prior to ablation, predict acute and midterm outcome of AF ablation by nMARQ™. METHODS: We included 75 patients (mean age 58 ± 11 years, 67 % male) with symptomatic paroxysmal AF...
October 6, 2016: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
Marc Napoleone, Ania Z Kielar, Rebecca Hibbert, Sameh Saif, Benjamin Y M Kwan
PURPOSE: We aimed to evaluate patterns of local tumor progression (LTP) after radiofrequency ablation (RF ablation) of colorectal cancer liver metastases (CRCLM) and to highlight the percentage of LTP not attributable to lesion size or RF ablation procedure-related factors (heat sink or insufficient ablation margin). METHODS: CRCLM treated by RF ablation at a single tertiary care center from 2004-2012, with a minimum of six months of post-procedure follow-up, were included in this retrospective study...
October 3, 2016: Diagnostic and Interventional Radiology: Official Journal of the Turkish Society of Radiology
Alessandra Buiatti, Gesa von Olshausen, Petra Barthel, Simon Schneider, Armin Luik, Bernhard Kaess, Karl-Ludwig Laugwitz, Petra Hoppmann
AIMS: Radiofrequency (RF) ablation represents a standard of care for pulmonary vein isolation in patients with drug-refractory paroxysmal atrial fibrillation (AF). In this setting, cryoballoon (CB) ablation has emerged as alternative therapy. However, the efficacy and safety of CB vs. RF ablation in patients with paroxysmal AF remain a matter of debate. METHODS AND RESULTS: We searched electronic scientific databases for studies of CB vs. RF ablation in patients with paroxysmal AF...
October 4, 2016: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
Tomofumi Nakamura, Kaoru Okishige, Toshiro Kanazawa, Mitsumi Yamashita, Naohiko Kawaguchi, Nobutaka Kato, Hideshi Aoyagi, Yasuteru Yamauchi, Tetsuo Sasano, Kenzo Hirao
AIMS: Pulmonary vein (PV) isolation (PVI) utilizing a cryoballoon (CB) has become one of the standard therapeutic options for atrial fibrillation (AF). However, it connotes a potential risk of cerebral ischaemic events (CIEs). This study aimed to clarify the prevalence of CIEs after PVI using second-generation CBs assessed by magnetic resonance imaging (MRI) of the brain. METHODS: This prospective observational study consisted of 160 patients that underwent PVI with second-generation CBs for drug-refractory AF...
October 4, 2016: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
Jingbo Jiang, Jinyi Li, Guoqiang Zhong, Junjun Jiang
PURPOSE: Currently, radiofrequency (RF) and cryoballoon are the most commonly used ablation technologies for atrial fibrillation (AF). We performed a meta-analysis to assess the efficacy and safety of the second-generation cryoballoons (CB-2) compared with RF for paroxysmal atrial fibrillation (PAF) ablation. METHODS: The PubMed, Cochrane Library, and Embase databases were searched and qualified studies were identified. The primary clinical outcome was the recurrence rate of atrial tachyarrhythmia (AT), and the secondary clinical outcomes were procedure time, fluoroscopy time, and the complications that followed...
September 28, 2016: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
Ye Kyeong Jun, So Lyung Jung, Ho Kyun Byun, Jung Hwan Baek, Jin Yong Sung, Jung Suk Sim
Eight iatrogenic thyroid pseudoaneurysms (ITPAs) after thyroid biopsy are reported. The mean ITPA diameter was 7.2 mm (range 4 to 12 mm). Ultrasound (US)-guided compression was initially performed at the neck of the ITPA in all cases. Among them, 4 ITPAs persisted (50%) in which radiofrequency (RF) ablation was performed. Mean RF ablation time and power were 13.5 seconds (range 5 to 24 seconds) and 20 W (range 10 to 50 W), respectively. All 4 cases were treated with RF ablation without any complications.
October 2016: Journal of Vascular and Interventional Radiology: JVIR
Mahipat Soni, Deepak Bohara, Anup Taksande, Ajay Mahajan, Pratap Nathani, Yash Lokhandwala
We present a case of recurrent highly symptomatic atrial tachycardia. During electrophysiology (EP) study, this was found to arise close to the AV node. To avoid conduction system damage by radiofrequency (RF) ablation, the aortic cusps were mapped. The tachycardia focus was close to the non-coronary cusp and ablated safely and successfully from this site.
December 2015: Journal of the Association of Physicians of India
Sebastian Ewen, Christian Ukena, Thomas Felix Lüscher, Martin Bergmann, Peter J Blankestijn, Erwin Blessing, Bodo Cremers, Oliver Dörr, Dagmara Hering, Lukas Kaiser, Holger Nef, Elias Noory, Markus Schlaich, Faisal Sharif, Isabella Sudano, Britta Vogel, Michiel Voskuil, Thomas Zeller, Abraham R Tzafriri, Elazer R Edelman, Lucas Lauder, Bruno Scheller, Michael Böhm, Felix Mahfoud
BACKGROUND/PURPOSE: Catheter-based renal sympathetic denervation (RDN) can reduce blood pressure (BP) and sympathetic activity in certain patients with uncontrolled hypertension. Less is known about the impact of renal anatomy and procedural parameters on subsequent BP response. METHODS/MATERIALS: A total of 564 patients with resistant hypertension underwent bilateral RDN in 9 centers in Europe and Australia using a mono-electrode radiofrequency catheter (Symplicity Flex, Medtronic)...
October 2016: Cardiovascular Revascularization Medicine: Including Molecular Interventions
Marwan Moussa, S Nahum Goldberg, Gaurav Kumar, Tatyana Levchenko, Vladimir Torchilin, Muneeb Ahmed
PURPOSE: The aim of this study was to evaluate the effect of different radio-frequency ablation (RFA) thermal doses on coagulation and heat shock protein (HSP) response with and without adjuvant nanotherapies. MATERIALS AND METHODS: First, Fischer rats were assigned to nine different thermal doses of hepatic RFA (50-90 °C, 2-20 min, three per group) or no treatment (n = 3). Next, five of these RF thermal doses were combined with liposomal-doxorubicin (Lipo-Dox, 1 mg intravenously) in R3230 breast tumours, or no tumour treatment (five per group)...
December 2016: International Journal of Hyperthermia
Haim Kaplan, Lilach Kaplan
BACKGROUND: In the recent years, there is a growth in demand for radiofrequency (RF)-based procedures to improve skin texture, laxity and contour. The new generation of systems allow non-invasive and fractional resurfacing treatments on one platform. OBJECTIVE: The aim of this study was to evaluate the safety and efficacy of a new treatment protocol using a multisource RF, combining 3 different modalities in each patient: [1] non-ablative RF skin tightening, [2] fractional skin resurfacing, and [3] microneedling RF for non-ablative coagulation and collagen remodelling...
October 5, 2016: Journal of Cosmetic and Laser Therapy: Official Publication of the European Society for Laser Dermatology
Stephan Becker, Alexander Hadjipavlou, Michael H Heggeness
BACKGROUND CONTENT: Lumbar axial back pain arising from degenerative disc disease continues to be a challenging clinical problem whether treated with non-surgical management, local injection, or motion segment stabilization and fusion. PURPOSE: To determine the efficacy of intraosseous basivertebral nerve ablation for the treatment of chronic lumbar back pain in a clinical setting. STUDY DESIGN: Patients meeting predefined inclusion/exclusion criteria were enrolled in a study using RF energy to ablate the basivertebral nerve within the vertebral bodies adjacent to the diagnosed level...
September 1, 2016: Spine Journal: Official Journal of the North American Spine Society
Ting-Yan Zhu, Shen-Rong Liu, Yan-Yu Chen, Liang-Zhen Xie, Li-Wei He, Su-Rong Meng, Jian Peng
OBJECTIVE: To compare the safety, feasibility, and efficacy of a completely nonfluoroscopic approach to radiofrequency catheter ablation (RFCA) using CARTO3 and ablation with conventional fluoroscopic guidance for treatment of idiopathic premature ventricular contractions from the aortic sinus cusp (ASC-PVCs). METHODS: From April 2013 to October 2015, we prospectively enrolled 52 consecutive patients with ASC-PVCs scheduled for either CARTO3 mapping-guided zero-fluoroscopy ablation (group A, n=23) or conventional fluoroscopic ablation (group B, n=29)...
August 20, 2016: Nan Fang Yi Ke da Xue Xue Bao, Journal of Southern Medical University
R Quesada, I Poves, M Iglesias, E Berjano, L Grande, F Burdío
BACKGROUND: Although radiofrequency-assisted devices have sometimes been used in partial splenectomy, this is not a common technique. This report describes the first case of laparoscopic partial splenectomy using an RF-assisted device (Coolinside) which allows both coagulation and transection of the parenchyma and eventually the protective coagulation of the remnant side. CASE PRESENTATION: A 27-year-old woman was found to have a giant hydatic cyst measuring 12...
December 2016: Surgical Case Reports
Michael Barkagan, Yoav Michowitz, Aharon Glick, Oholi Tovia-Brodie, Raphael Rosso, Bernard Belhassen
BACKGROUND: A few series of focal atrial tachycardia (AT) originating from the noncoronary sinus of Valsalva (NCSV) have been reported in the literature during the last decade. METHODS AND RESULTS: Of 147 patients with AT referred for radiofrequency ablation (RFA), we identified nine (6%) originating in the vicinity of the NCSV. Clinical AT was induced during electrophysiological study in all patients without (n = 6) and with (n = 3) isoproterenol infusion. Mean cycle length of the induced tachycardia was 399 ± 85 ms...
August 24, 2016: Pacing and Clinical Electrophysiology: PACE
Rongxin Chen, Yuhong Gan, Ninglin Ge, Yi Chen, Yan Wang, Boheng Zhang, Yanhong Wang, Shenglong Ye, Zhenggang Ren
PURPOSE: To compare outcomes of transarterial chemoembolization with radiofrequency (RF) ablation in treatment of recurrent hepatocellular carcinoma (HCC) after resection within Barcelona Clinic Liver Cancer (BCLC) stage 0/A. MATERIALS AND METHODS: From January 2007 to December 2011, 110 consecutive patients with recurrent HCC meeting BCLC stage 0/A criteria underwent transarterial chemoembolization (n = 78; mean tumor size, 1.9 cm ± 1.0) or RF ablation (n = 32; mean tumor size, 1...
August 20, 2016: Journal of Vascular and Interventional Radiology: JVIR
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