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https://www.readbyqxmd.com/read/28081593/percutaneous-cryoablation-for-hepatocellular-carcinoma
#1
Kyoung Doo Song
Local ablation therapy is considered as a conventional treatment option for patients with early stage hepatocellular carcinoma (HCC). Although radiofrequency (RF) ablation is widely used for HCC, the use of cryoablation has been increasing as newer and safer cryoablation systems have developed. The thermodynamic mechanism of freezing and thawing used in cryoablation is the Joule-Thomson effect. Cryoablation destroys tissue via direct tissue destruction and vascular-related injury. A few recent comparative studies have shown that percutaneous cryoablation for HCCs is comparable to percutaneous RF ablation in terms of long term therapeutic outcomes and complications...
December 2016: Clinical and Molecular Hepatology
https://www.readbyqxmd.com/read/28066659/percutaneous-epicardial-ablation-of-incessant-atrial-tachycardia-originating-from-the-left-atrial-appendage
#2
Ji-Eun Ban, Tae Young Park, Sang-Weon Park
A 38-year-old woman presented with antiarrhythmic drug-refractory atrial tachycardia (AT). Holter recording demonstrated incessant episodes of AT followed by a long sinus pause. Electrophysiologic study revealed that the earliest endocardial activation was observed at the neck of the left atrial appendage (LAA). After unsuccessful endocardial ablation, epicardial access via a percutaneous subxiphoid approach demonstrated that the earliest epicardial atrial activation was observed on the opposite site to the endocardial LAA neck suggestive of ligament of Marshall (LOM) muscle sleeve as regarding the epicardial sharp potentials under guidance of a circular mapping catheter...
November 2016: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28065886/cryoablation-vs-radiofrequency-ablation-for-treatment-of-paroxysmal-atrial-fibrillation-a-systematic-review-and-meta-analysis
#3
REVIEW
Yi-He Chen, Zhao-Yang Lu, Yin- Xiang, Jian-Wen Hou, Qian Wang, Hui Lin, Yi-Gang Li
AIMS: Cryoablation is a promising alternative technique to RF ablation for treating paroxysmal AF with encouraging results. However, data about the efficacy and safety comparison between cryoablation and RF ablation is still lacking. METHODS AND RESULTS: We systematically search the PubMed, the Cochrane Library, MEDLINE and Google Scholar databases, and finally identify 16 eligible studies including 7195 patients (2863 for cryoablation; 4332 for RF ablation). Freedom from AF/atrial tachycardial replase is slightly higher in cryoablation than RF ablation during a median 12 months of follow-up, with no statistical significant (RR: 1...
January 8, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28063111/comparison-of-catheter-ablation-for-paroxysmal-atrial-fibrillation-between-cryoballoon-and-radiofrequency-a-meta-analysis
#4
REVIEW
Chao-Feng Chen, Xiao-Fei Gao, Xu Duan, Bin Chen, Xiao-Hua Liu, Yi-Zhou Xu
PURPOSE: The present systematic review and meta-analysis aimed to assess and compare the safety and efficacy of radiofrequency (RF) and cryoballoon (CB) ablation for paroxysmal atrial fibrillation (PAF). RF and CB ablation are two frequently used methods for pulmonary vein isolation in PAF, but which is a better choice for PAF remains uncertain. METHODS: A systematic review was conducted in Medline, PubMed, Embase, and Cochrane Library. All trials comparing RF and CB ablation were screened and included if the inclusion criteria were met...
January 7, 2017: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
https://www.readbyqxmd.com/read/28054738/radiofrequency-catheter-ablation-targeting-the-vein-of-marshall-in-difficult-mitral-isthmus-ablation-or-pulmonary-vein-isolation
#5
Ji Hyun Lee, Gi-Byoung Nam, Minsu Kim, You Mi Hwang, Jongmin Hwang, Jun Kim, Kee-Joon Choi, You-Ho Kim
INTRODUCTION: The ligament of Marshall may hinder the creation of mitral isthmus (MI) block or pulmonary vein (PV) isolation (PVI) in radiofrequency (RF) catheter ablation of atrial fibrillation (AF). We aimed to assess the benefit of RF ablation targeting the vein of Marshall (VOM) in failed cases of MI block or PVI. METHODS AND RESULTS: We reviewed the medical records of patients who underwent RF ablation targeting the VOM after failed MI ablation or left PVI using the conventional method, which included circumferential point-by-point ablation around the PV antrum and carina, or endocardial MI and epicardial distal coronary sinus (CS) ablation for MI block...
January 5, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/28054727/direct-comparison-of-point-by-point-and-rapid-ultra-high-resolution-electroanatomical-mapping-in-patients-scheduled-for-ablation-of-atrial-fibrillation
#6
Laura Rottner, Andreas Metzner, Feifan Ouyang, Christian Heeger, Kentaro Hayashi, Thomas Fink, Christine Lemes, Shibu Mathew, Tilman Maurer, Bruno REIßMANN, Enida Rexha, Johannes Riedl, Ardan M Saguner, Francesco Santoro, Karl-Heinz Kuck, Christian Sohns
INTRODUCTION: 3D electroanatomical mapping (EAM) is an established tool facilitating catheter ablation. In this context the novel Rhythmia system sets a new bar in fast high-resolution mapping. The aim of this study was to directly compare point-by-point versus rapid ultra high-resolution EAM in patients scheduled for ablation of atrial fibrillation (AF) with focus on procedural data, acute success and mid-term clinical outcome. METHODS AND RESULTS: A total number of 74 consecutive patients (48/74 male) with symptomatic AF were scheduled to undergo pulmonary vein isolation (PVI) using either Carto or Rhythmia...
January 5, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/28054377/left-atrial-substrate-modification-targeting-low-voltage-areas-for-catheter-ablation-of-atrial-fibrillation-a-systematic-review-and-meta-analysis
#7
REVIEW
Alessandro Blandino, Francesca Bianchi, Stefano Grossi, Giuseppe Biondi-Zoccai, Maria Rosa Conte, Luca Gaido, Fiorenzo Gaita, Marco Scaglione, Francesco Rametta
BACKGROUND: This meta-analysis aims to assess the impact of a voltage-guided substrate modification by targeting low-voltage area (LVA) in addition to pulmonary vein isolation (PVI) in patients undergoing catheter ablation for atrial fibrillation (AF). METHODS: MEDLINE/PubMed, Cochrane Library and references reporting AF ablation and 'voltage* OR substrate* OR fibrosis OR fibrotic area* were screened and studies included if matching inclusion and exclusion criteria...
January 5, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28018497/morphological-comparison-of-blood-vessels-that-were-heated-with-a-radiofrequency-device-or-a-1470-nm-laser-and-a-radial-2ring-fiber
#8
Takashi Yamamoto, Masahiro Sakata
Introduction: Radio waves and lasers can be used as heat sources during endovenous thermal ablation (EVTA) for saphenous vein insufficiency. A morphological comparison of veins that had been treated with EVTA was performed between those treated with an endovenous closure system (a radiofrequency [RF] system) and those treated with a Radial 2Ring fiber connected to a 1470-nm laser generator (2R). Methods: The experiment was conducted in a system that reproduces the physiological conditions found in the saphenous veins during EVTA...
2016: Annals of Vascular Diseases
https://www.readbyqxmd.com/read/28017938/elucidation-of-hidden-slow-conduction-by-double-ventricular-extrastimuli-a-method-for-further-arrhythmic-substrate-identification-in-ventricular-tachycardia-ablation-procedures
#9
Juan Acosta, David Andreu, Diego Penela, Mario Cabrera, Alicia Carlosena, Viatcheslav Korshunov, Francesca Vassanelli, Roger Borras, Mikel Martínez, Juan Fernández-Armenta, Markus Linhart, José M Tolosana, Lluis Mont, Antonio Berruezo
AIMS: Identification of local abnormal electrograms (EGMs) during ventricular tachycardia substrate ablation (VTSA) is challenging when they are hidden within the far-field signal. This study analyses whether the response to a double ventricular extrastimulus during substrate mapping could identify slow conducting areas that are hidden during sinus rhythm. METHODS AND RESULTS: Consecutive patients (n = 37) undergoing VTSA were prospectively included. Bipolar EGMs with >3 deflections and duration <133 ms were considered as potential hidden slow conduction EGMs (HSC-EGM) if located within/surrounding the scar area...
December 25, 2016: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28012690/embolization-for-bleeding-after-hepatic-radiofrequency-ablation
#10
Jong Woo Kim, Ji Hoon Shin, Pyo Nyun Kim, Yong Moon Shin, Hyung Jin Won, Gi-Young Ko, Hyun-Ki Yoon
PURPOSE: To evaluate safety and clinical efficacy of embolization for management of bleeding after hepatic radiofrequency (RF) ablation. MATERIALS AND METHODS: From January 2000 to December 2014, 5,196 patients with 9,743 tumors underwent 8,303 RF ablation sessions. Of these patients, 62 experienced bleeding after hepatic RF ablation; 15 patients (12 men and 3 women; mean age 62 y; range, 49-76 y) underwent embolization and composed the final study cohort. Tumors were hepatocellular carcinomas in 13 (87%) patients and metastatic adenocarcinomas from colorectal cancer in 2 (13%) patients...
December 21, 2016: Journal of Vascular and Interventional Radiology: JVIR
https://www.readbyqxmd.com/read/27997267/non-ablative-radiofrequency-associated-or-not-with-low-level-laser-therapy-on-the-treatment-of-facial-wrinkles-in-adult-women-a-randomized-single-blind-clinical-trial
#11
Thalita Rodrigues Christovam Pereira, Patrícia Gabrielli Vassão, Michele Garcia Venancio, Ana Cláudia Muniz Renno, Mariana Chaves Aveiro
OBJECTIVES: To evaluate the effects of Non-ablative Radiofrequency (RF) associated or not with Low-Level Laser Therapy (LLLT) on aspect of facial wrinkles among adult women. METHODS: Forty-six participants were randomized into three groups: Control Group (CG, n=15); RF Group (RG, n=16), RF and LLLT Group (RLG, n=15). Every participant was evaluated on baseline (T0), after eight weeks (T8) and eight weeks after the completion of treatment (follow-up). They were photographed in order to classify nasolabial folds and periorbital wrinkles (Modified Fitzpatrick Wrinkle Scale and Fitzpatrick Wrinkle Classification System, respectively) and improvement on appearance (Global Aesthetic Improvement Scale)...
December 20, 2016: Journal of Cosmetic and Laser Therapy: Official Publication of the European Society for Laser Dermatology
https://www.readbyqxmd.com/read/27995127/stereotactic-laser-ablation-for-medically-intractable-epilepsy-the-next-generation-of-minimally-invasive-epilepsy-surgery
#12
REVIEW
Michael J LaRiviere, Robert E Gross
Epilepsy is a common, disabling illness that is refractory to medical treatment in approximately one-third of patients, particularly among those with mesial temporal lobe epilepsy. While standard open mesial temporal resection is effective, achieving seizure freedom in most patients, efforts to develop safer, minimally invasive techniques have been underway for over half a century. Stereotactic ablative techniques, in particular, radiofrequency (RF) ablation, were first developed in the 1960s, with refinements in the 1990s with the advent of modern computed tomography and magnetic resonance-based imaging...
2016: Frontiers in Surgery
https://www.readbyqxmd.com/read/27974359/safety-and-mid-term-outcome-of-catheter-ablation-of-ventricular-tachycardia-in-octogenarians
#13
Antonio Frontera, Sandeep Panniker, Alexander Breitenstein, Vito Domenico Bruno, Georgia May Connolly, David Wilson, Teresa Rio, Mehul B Dhinoja, Wajid Hussain, Richard J Schilling, Glyn Thomas, Tom Wong, Ross J Hunter, Frederic Sacher, Pierre Jaïs, Edward Duncan
AIMS: Radiofrequency (RF) catheter ablation (CA) is superior to standard medical therapy in controlling recurrent ventricular tachycardia (VT). The majority of procedures have been performed in a middle-aged population. The outcome of VT ablation in the elderly has not been described. METHODS AND RESULTS: We retrospectively studied the outcome and safety of CA of VT in octogenarians performed in four European centres. The population consisted of patients presenting with recurrent VT refractory to medical therapy...
November 9, 2016: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/27966462/radio-frequency-mediated-local-thermotherapy-for-destruction-of-pancreatic-tumors-using-ni-au-core-shell-nanowires
#14
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/27943352/electrode-contact-force-controlled-bipolar-radiofrequency-ablation-different-effects-on-lesion-size-between-dual-and-single-bath-preparations
#15
Masaomi Chinushi, Osamu Saitoh, Junya Watanabe, Ayari Sugai, Katsuya Suzuki, Yukio Hosaka, Hiroshi Furushima
BACKGROUND: During bipolar (BIP) radiofrequency (RF) ablation using 2 catheters in humans, each catheter is placed in separate cardiac chambers or spaces. We developed a contact force-controlled experimental preparation, and compared measurements made with 2 catheters placed in a single bath (SB), versus each catheter placed in separate baths, in order to assess the preparation-dependent differences in the results of BIP-RF ablation. METHODS: In the SB experiments, a porcine heart was placed in the center of the bath, while in the dual bath (DB) experiments, it was placed between 2 half baths communicating through windows...
December 10, 2016: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/27942926/laser-guidance-in-c-arm-cone-beam-ct-guided%C3%A2-radiofrequency-ablation-of-osteoid-osteoma-reduces-fluoroscopy-time
#16
Maarten W Kroes, Wendy M H Busser, Yvonne L Hoogeveen, Frank de Lange, Leo J Schultze Kool
PURPOSE: To assess whether laser guidance can reduce fluoroscopy and procedure time of cone-beam computed tomography (CBCT)-guided radiofrequency (RF) ablations of osteoid osteoma compared to freehand CBCT guidance. MATERIALS AND METHODS: 32 RF ablations were retrospectively analyzed, 17 laser-guided and 15 procedures using the freehand technique. Subgroup selection of 18 ablations in the hip-pelvic region with a similar degree of difficulty was used for a direct comparison...
December 9, 2016: Cardiovascular and Interventional Radiology
https://www.readbyqxmd.com/read/27932994/comparative-mrna-and-microrna-profiling-during-acute-myocardial-infarction-induced-by-coronary-occlusion-and-ablation-radio-frequency-currents
#17
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/27930718/seeing-the-invisible-revealing-atrial-ablation-lesions-using-hyperspectral-imaging-approach
#18
Narine Muselimyan, Luther M Swift, Huda Asfour, Tigran Chahbazian, Ramesh Mazhari, Marco A Mercader, Narine A Sarvazyan
BACKGROUND: Currently, there are limited means for high-resolution monitoring of tissue injury during radiofrequency ablation procedures. OBJECTIVE: To develop the next generation of visualization catheters that can reveal irreversible atrial muscle damage caused by ablation and identify viability gaps between the lesions. METHODS: Radiofrequency lesions were placed on the endocardial surfaces of excised human and bovine atria and left ventricles of blood perfused rat hearts...
2016: PloS One
https://www.readbyqxmd.com/read/27930527/feasibility-of-radiofrequency-ablation-as-an-alternative-to-surgical-intervention-in-patients-with-huge-multiloculated-pyogenic-liver-abscesses-a-retrospective-cohort-study
#19
Shan Ke, Xue-Mei Ding, Jun Gao, Shao-Hong Wang, Jian Kong, Li Xu, Wen-Bing Sun
This retrospective cohort study investigated the feasibility of radiofrequency (RF) ablation as an alternative to surgical intervention in patients with huge multiloculated pyogenic liver abscesses (PLAs).From August 2010 to April 2016, 83 patients with PLA were admitted to Beijing Chao-Yang Hospital, China. Four of these patients had huge multiloculated PLAs and underwent RF ablation plus antibiotics. The inclusion criteria for RF ablation were as follows: multiloculated PLA confirmed by computed tomography (CT) or magnetic resonance imaging (MRI), widest diameter of the PLA ≥5 cm, failure to respond to or not suitable to treatment with percutaneous drainage (PD), and patient refusal of surgery...
December 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27925468/the-prediction-of-radiofrequency-ablation-zone-volume-using-vascular-indices-of-3-dimensional-volumetric-color-doppler-ultrasound-in-an-in-vitro-blood-perfused-bovine-liver-model
#20
Samuel Chang, Anthony C Lanctot, Martin D McCarter, Katherine M Roberts, Deborah H Glueck, Gerald D Dodd
OBJECTIVE: To determine the most reliable predictor of radiofrequency (RF) ablation zone volume among 3D volumetric color Doppler vascular indices in in-vitro blood-perfused bovine liver model. METHODS: 3D color Doppler volume data of the local hepatic parenchyma were acquired from 37 areas of 13 bovine livers connected to in-vitro oxygenated blood perfusion system. Doppler vascular indices of vascularization index (VI), flow index (FI), and vascularization-flow index (VFI) were obtained from the volume data using a 3D volume analysis software...
December 7, 2016: British Journal of Radiology
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