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radiofrequency ablations

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https://www.readbyqxmd.com/read/29452255/radiofrequency-ablation-of-premature-ventricular-contractions-originating-from-uncommon-sites-of-right-ventricle
#1
Krishna Kumar Mohanan Nair, Narayanan Namboodiri, Arun Gopalakrishnan, Ajitkumar Valaparambil
Premature Ventricular Contraction (PVC)/ventricular tachycardia (VT) with left bundle branch block (LBBB) morphology and inferior axis has been described classically to originate from the right ventricular outflow tract (RVOT). Some uncommon sites of idiopathic ventricular arrhythmia (VA) origins have been revealed including tricuspid annulus (TA) and right ventricular (RV) inflow free wall region. We present a series of two cases who have undergone electrophysiological study and successful radiofrequency ablation of frequent monomorphic PVCs with LBBB pattern originating from relatively uncommon sites of RV - TA and RV inflow free wall region...
February 13, 2018: Indian Pacing and Electrophysiology Journal
https://www.readbyqxmd.com/read/29450575/osteoblastomatosis-an-unusual-diagnosis-and-treatment
#2
Elena Quílez-Caballero, José Martel-Villagran, Ángel Luis Bueno-Horcajadas, Laura López-Brasal, María Jesús Díaz-Candamio
Osteoblastomatosis (OBLT), also referred to as multifocal osteoblastoma (OB), is an unusual and recently described entity consisting of multifocal tumors histologically consistent with osteoblastoma and osteoid osteoma (OO) but radiologically mimicking a vascular bone lesion. OBLT treatment is based on aggressive procedures, such as amputation, en bloc resection, and chemotherapy. Only one previously reported case was successfully treated following a multimodal approach consisting of curettage, cryotherapy, intravenous bisphosphonates, and radiofrequency ablation...
February 15, 2018: Skeletal Radiology
https://www.readbyqxmd.com/read/29449354/high-resolution-infrared-thermography-of-esophageal-temperature-during-radiofrequency-ablation-of-atrial-fibrillation
#3
Matthew G Daly, Iain Melton, Graham Roper, Gary Lim, Ian G Crozier
BACKGROUND: Catheter ablation for atrial fibrillation has potential to cause esophageal thermal injury. Esophageal temperature monitoring during ablation is commonly used; however, it has not eliminated thermal injuries, possibly because conventional sensors have poor spatial sampling and response characteristics. To enhance understanding of temperature dynamics that may underlie esophageal injury, we tested a high-resolution, intrabody, infrared thermography catheter to continuously image esophageal temperatures during ablation...
February 2018: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/29448289/lessons-from-pathological-analysis-of-recurrent-early-esophageal-squamous-cell-neoplasia-after-complete-endoscopic-radiofrequency-ablation
#4
Wen-Lun Wang, I-Wei Chang, Chien-Chuan Chen, Chi-Yang Chang, Cheng-Hao Tseng, Chi-Ming Tai, Jaw-Town Lin, Hsiu-Po Wang, Ching-Tai Lee
BACKGROUND: Endoscopic radiofrequency ablation (RFA) is a treatment option for early esophageal squamous cell neoplasia (ESCN); however, long-term follow-up studies are lacking. The risks of local recurrence and "buried cancer" are also uncertain. METHODS: Patients with flat-type ESCN who were treated with balloon-type ± focal-type RFA were consecutively enrolled. Follow-up endoscopy was performed at 1, 3, and 6 months, and then every 6 months thereafter...
February 15, 2018: Endoscopy
https://www.readbyqxmd.com/read/29445983/impact-of-the-pulmonary-vein-orifice-area-assessed-using-intracardiac-echocardiography-on-the-outcome-of-radiofrequency-catheter-ablation-for-atrial-fibrillation
#5
Takashi Nakashima, Masanori Kawasaki, Hiroyuki Toyoshi, Nobuhiro Takasugi, Tomoki Kubota, Hiromitsu Kanamori, Hiroaki Ushikoshi, Takuma Aoyama, Kazuhiko Nishigaki, Shinya Minatoguchi
PURPOSE: The purposes of this study were to investigate pulmonary vein cross-sectional orifice area (PV-CSOA) using intracardiac echocardiography (ICE) and to determine its association with atrial fibrillation (AF) recurrence after radiofrequency catheter ablation (RFCA). METHODS: We studied 77 patients undergoing initial RFCA for AF (55 paroxysmal and 22 persistent AF patients, mean age 61 ± 12 years, 59 men). The PV-CSOA was measured in each patient and expressed as an index divided by the body surface area-left superior (LSPV-CSOA), left inferior (LIPV-CSOA), right superior (RSPV-CSOA), and right inferior (RIPV-CSOA)...
February 14, 2018: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
https://www.readbyqxmd.com/read/29444219/complex-cases-of-acquired-pulmonary-vein-stenosis-after-radiofrequency-ablation-is-surgical-repair-an-option
#6
Katharina Schoene, Philipp Sommer, Arash Arya, Martin Kostelka, Friedrich W Mohr, Martin Misfeld, Marcel Vollroth, Andreas Bollmann, Julia Lurz, Gerhard Hindricks, Joerg Seeburger
Aims: Results of catheter based interventional treatment for pulmonary vein stenosis (PVS) following radiofrequency ablation (RFA) for atrial fibrillation remain suboptimal. Surgical repair may represent an alternative therapy, though long-term results have not been thoroughly investigated. Methods and results: We retrospectively assessed all patients in our centre undergoing surgical repair for radiofrequency-induced PVS. Data regarding surgical technique, clinical outcome, and rate of pulmonary vein (PV) restenosis were collected and analysed...
February 12, 2018: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/29444164/evolution-of-nodule-stiffness-might-predict-response-to-local-ablative-therapy-a-series-of-patients-with-hepatocellular-carcinoma
#7
Michael Praktiknjo, Viktoria Krabbe, Alessandra Pohlmann, Matthias Sampels, Christian Jansen, Carsten Meyer, Christian P Strassburg, Jonel Trebicka, Maria A Gonzalez Carmona
BACKGROUND: Early information on treatment response of HCC to local ablative therapy is crucial. Elastography as a non-invasive method has recently been shown to play a potential role in distinguishing between benign and malignant liver lesions. Elastography of hepatocellular carcinoma (HCC) in early response to local ablative therapy has not been studied to date. METHODS: We prospectively included a cohort of 14 patients with diagnosis of HCC who were treated with local ablative therapy (transarterial chemoembolization, TACE and/or radiofrequency ablation, RFA)...
2018: PloS One
https://www.readbyqxmd.com/read/29443747/supraglottoplasty-in-neonates-and-infants-a-radiofrequency-ablation-approach
#8
Shilei Pu, Hongming Xu, Xiaoyan Li
BACKGROUND: Supraglottoplasty is the mainstay of surgical treatment for laryngomalacia. A novel supraglottoplasty surgical technique is needed to achieve better efficacy. The purpose of this study was to introduce modified microscopic radiofrequency ablation supraglottoplasty (MMRAS) for the treatment of congenital laryngomalacia and to evaluate the outcome and effectiveness of this novel approach. METHODS: Seventeen children with severe laryngomalacia who underwent MMRAS were studied retrospectively...
February 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29441813/understanding-the-nuances-of-microwave-ablation-for-more-accurate-post-treatment-assessment
#9
Christy Kim
Microwave ablation (MWA) is a relatively new thermal modality for minimally invasive procedures compared with radiofrequency ablation. Although MWA and radiofrequency ablation are thermal modalities, their underlying physics and principles greatly differ. Consequently, it is imperative that clinicians be aware of how these differences impact realized ablation volumes to consistently ensure technical success and better patient outcomes. This paper will review the nuances specific to MWA technology (i.e., tissue properties, perfusion/heat sink effect, ablation assessment, imaging accuracy and tissue contraction) that are often overlooked based on familiarity with conventional thermal modalities to guide more accurate assessment of post-treatment MWA volumes...
February 14, 2018: Future Oncology
https://www.readbyqxmd.com/read/29441805/imaging-after-radiofrequency-ablation-of-renal-tumors
#10
Umberto Russo, Umberto Maestroni, Roberto Vito Papapietro, Vincenzo Trunfio, Francesco Ziglioli, Stefania Ferretti, Luca Brunese, Gianpaolo Carrafiello, Massimo De Filippo
The number of percutaneous radiofrequency ablation procedures performed for renal tumors is progressively increasing worldwide. Periodic imaging follow-up has the double role to guarantee the treatment efficacy over time and to early detect any possible complication. Tumor size reductions, as well as the appearance of the characteristic 'halo sign', are normal findings that represent good ablative outcomes. However the most reliable factor of ablation efficacy remains the total absence of contrast enhancing zones within the ablated area...
February 14, 2018: Future Oncology
https://www.readbyqxmd.com/read/29441744/cryoballoon-ablation-for-atrial-fibrillation-a-comprehensive-review-and-practice-guide
#11
REVIEW
Eun Sun Jin, Paul J Wang
The cryoballoon was invented to achieve circumferential pulmonary vein isolation more efficiently to compliment the shortcomings of point-by-point ablation by radiofrequency ablation (RFA). Its efficacy and safety were shown to be comparable to those of RFA, and the clinical outcomes have improved with the second-generation cryoballoon. The basic biophysics, implemental techniques, procedural recommendations, clinical outcomes, and complications of the cryoballoon are presented in this practical and systematic review...
February 2018: Korean Circulation Journal
https://www.readbyqxmd.com/read/29441336/a-prospective-randomized-study-comparing-radiofrequency-ablation-and-hepatic-resection-for-hepatocellular-carcinoma
#12
Hae Won Lee, Jeong Min Lee, Jung-Hwan Yoon, Yoon Jun Kim, Joong-Won Park, Sang-Jae Park, Seong Hoon Kim, Nam-Joon Yi, Kyung-Suk Suh
Purpose: Although there are several prospective clinical studies comparing radiofrequency ablation (RFA) and hepatic resection (HR) for the treatment of hepatocellular carcinoma, there are few trials that have been performed in strictly homogeneous patients. Methods: Patients who were newly diagnosed with a solitary hepatocellular carcinoma were randomized to the HR or RFA group. Inclusion criteria were as follows: age ≥ 20 years but ≤ 70 years, Child-Pugh class A, maximal diameter of the tumor ≥ 2 cm but ≤ 4 cm, no previous treatment history, and platelet count > 80,000/mm 3 ...
February 2018: Annals of Surgical Treatment and Research
https://www.readbyqxmd.com/read/29440276/accurate-depth-of-radiofrequency-induced-lesions-in-renal-sympathetic-denervation-based-on-a-fine-histological-sectioning-approach-in-a-porcine-model
#13
Atsushi Sakaoka, Hisako Terao, Shintaro Nakamura, Hitomi Hagiwara, Toshihito Furukawa, Kiyoshi Matsumura, Kenichi Sakakura
BACKGROUND: Ablation lesion depth caused by radiofrequency-based renal denervation (RDN) was limited to <4 mm in previous animal studies, suggesting that radiofrequency-RDN cannot ablate a substantial percentage of renal sympathetic nerves. We aimed to define the true lesion depth achieved with radiofrequency-RDN using a fine sectioning method and to investigate biophysical parameters that could predict lesion depth. METHODS AND RESULTS: Radiofrequency was delivered to 87 sites in 14 renal arteries from 9 farm pigs at various ablation settings: 2, 4, 6, and 9 W for 60 seconds and 6 W for 120 seconds...
February 2018: Circulation. Cardiovascular Interventions
https://www.readbyqxmd.com/read/29439532/a-quick-surgical-treatment-of-conjunctivochalasis-using-radiofrequencies
#14
Alexandra Trivli, Georgios Dalianis, Chryssa Terzidou
The purpose of our study is to present a quick surgical procedure for the treatment of Conjunctivochalasis (CCH) and to evaluate its effectiveness. Thirty consecutive patients, in whom CCH was diagnosed on clinical examination, were investigated for the presence of symptoms of dry eye. The 60 eyes were evaluated according to their symptomatology and the 40 symptomatic eyes were grouped in two stages using the LIPCOF (stage 1, one small fold; stage 2, more than two folds but not higher than the tear meniscus) classification and included in the study...
February 12, 2018: Healthcare (Basel, Switzerland)
https://www.readbyqxmd.com/read/29439000/endo-epicardial-catheter-ablation-of-atrial-fibrillation-feasibility-outcome-and-insights-into-arrhythmia-mechanisms
#15
Christopher Piorkowski, Mads Kronborg, Jerome Hourdain, Judith Piorkowski, Bettina Kirstein, Sebastian Neudeck, Simon Wechselberger, Ellen Päßler, Anastasia Löwen, Ali El-Armouche, Julia Mayer, Stefan Ulbrich, Liying Pu, Utz Richter, Thomas Gaspar, Yan Huo
BACKGROUND: Until today, catheter interventional mapping and ablation of atrial fibrillation (AF) has been limited to the right and left atrial endocardium. We report feasibility, electrophysiological findings, and clinical outcome using a combined endo-/epicardial catheter approach for mapping and ablation of AF. METHODS AND RESULTS: Fifty-nine patients with permanence of pulmonary vein isolation and further symptomatic recurrences of paroxysmal AF, persistent AF, or atrial tachycardia underwent reablation using biatrial endo-/epicardial mapping and ablation...
February 2018: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/29437733/cough-as-the-sole-manifestation-of-pericardial-effusion
#16
Hee Kong Fong, Obai Abdullah, Sandeep Gautam
A 59-year-old woman with paroxysmal atrial fibrillation (AF) presented with severe non-productive cough, malaise, low-grade fever and AF flare-up 3 weeks following pulmonary vein isolation with radiofrequency catheter ablation. She denied chest pain or dyspnoea. Patient was haemodynamically stable. There was no pulsus paradoxus. Laboratories showed leucocytosis and elevated C-reactive protein. ECG showed sinus tachycardia. CT abdomen and pelvis showed a large pericardial effusion (PE). Shortly after admission, she developed AF with rapid ventricular response, responsive to intravenous amiodarone...
February 5, 2018: BMJ Case Reports
https://www.readbyqxmd.com/read/29436191/cha%C3%A2-ds%C3%A2-vasc-score-in-the-prediction-of-ischemic-stroke-in-patients-after-radiofrequency-catheter-ablation-of-typical-atrial-flutter
#17
Moo Nyun Jin, Changho Song, Tae Hoon Kim, Jae Sun Uhm, Hui Nam Pak, Moon Hyoung Lee, Boyoung Joung
PURPOSE: Despite undergoing successful catheter ablation of typical atrial flutter (AFL), patients remain at increased risk for ischemic stroke. However, data on risk prediction tools for the development of stroke after AFL ablation are lacking. This study investigates whether CHA₂DS₂-VASc score is useful for predicting ischemic stroke after successful ablation of typical AFL. MATERIALS AND METHODS: A total of 293 patients (236 men, mean age 56.1±13.5 years) who underwent successful radiofrequency catheter ablation for typical AFL were included in this study...
March 2018: Yonsei Medical Journal
https://www.readbyqxmd.com/read/29436052/a-randomized-trial-to-compare-the-acute-reconnection-after-pulmonary-vein-isolation-with-laser-balloon-vs-radiofrequency-ablation-ratisbona-trial
#18
Ekrem Ücer, Yvette Janeczko, Joachim Seegers, Sabine Fredersdorf, Selina Friemel, Florian Poschenrieder, Lars Siegfried Maier, Carsten Gerald Jungbauer
INTRODUCTION: Dormant conduction and acute reconnection in the pulmonary veins (PV) during a PV isolation can be detected by performing an adenosine provocation test (APT). Visually guided laser balloon ablation (VGLB) creates deep transmural lesions, thus causing less acute reconnection. This study compared the acute PV reconnection rate after isolation with VGLB or with RF using an APT. METHODS AND RESULTS: Patients with paroxysmal AF were randomized to PVI with the VGLB or RF ablation...
February 13, 2018: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29435991/vagus-nerve-injury-symptoms-after-catheter-ablation-for-atrial-fibrillation
#19
Victoria Jacobs, Heidi T May, Brian G Crandall, Becca Ballantyne, Ben Chisum, Dave Johnson, Kevin G Graves, Michael Cutler, John D Day, Charles Mallender, Jeffrey S Osborn, J Peter Weiss, Thomas Jared Bunch
BACKGROUND: Vagus nerve injury during catheter ablation for atrial fibrillation (AF) can significantly impact quality of life and result in lingering gastrointestinal symptoms. This study was designed to define risk factors of vagal nerve injury, symptom prevalence and temporal resolution. METHODS: A total of 100 patients undergoing radiofrequency catheter ablation (RFCA) were enrolled and consented to participate in the study. Patients completed a 22 item questionnaire that included questions specific to vagus nerve injury symptomatology during their baseline visit and at 1 and 3 months post-RFCA...
February 13, 2018: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/29435790/randomized-controlled-trial-of-amigo%C3%A2-robotically-controlled-versus-manually-controlled-ablation-of-the-cavo-tricuspid-isthmus-using-a-contact-force-ablation-catheter
#20
Kurt S Hoffmayer, Felix Krainski, Sanjay Shah, Jessica Hunter, Maylene Alegre, Jonathan C Hsu, Gregory K Feld
BACKGROUND: Radiofrequency catheter ablation (RFCA) of the cavo-tricuspid isthmus (CTI) is a common treatment for atrial flutter (AFL). However, achieving bi-directional CTI conduction block may be difficult, partly due to catheter instability. OBJECTIVE: To evaluate the safety and efficacy of the Amigo® Remote Catheter System (RCS) compared to manual catheter manipulation, during CTI ablation for AFL. METHODS: Fifty patients (pts) were prospectively randomized to robotically (25 pts) versus manually (25 pts) controlled catheter manipulation during CTI ablation, using a force-contact sensing, irrigated ablation catheter...
February 12, 2018: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
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