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RF ablation

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https://www.readbyqxmd.com/read/28800176/catheter-ablation-of-left-atrial-arrhythmias-on-uninterrupted-oral-anticoagulation-with-vitamin-k-antagonists-how-is-the-relationship-between-international-normalized-ratio-activated-clotting-time-and-procedure-related-complications
#1
Marc Kottmaier, Felix Bourier, Verena Semmler, Martha Telishevska, Katharina Koch-Büttner, Carsten Lennerz, Sarah Lengauer, Marielouise Kornmayer, Elena Rousseva, Stephanie Brooks, Amir Brkic, Christian Grebmer, Christoph Kolb, Gabriele Hessling, Isabel Deisenhofer, Tilko Reents
BACKGROUND: Ablation of atrial fibrillation (AF) on uninterrupted phenprocoumon reduces periprocedural thromboembolic and bleeding complications. Heparin is administered intraprocedurally to achieve activated clotting times (ACT) of 300-400 seconds. We investigated the effect of international normalized ratio (INR) on ACT and intraprocedural heparin requirements. Moreover, safety of a target ACT of 250-300 seconds was investigated. METHODS AND RESULTS: We studied 949 patients referred for AF or left atrial tachycardia ablation...
August 11, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/28781871/anterior-mitral-leaflet-perforation-a-rare-complication-of-radiofrequency-ablation-for-paroxysmal-supraventricular-tachycardia
#2
Jiancheng Han, Jin Xu, Yihua He
A 9-year-old girl with a ten-day history of palpitations was referred for the assessment of mitral regurgitation. She had had RF ablation for paroxysmal supraventricular tachycardia 5 years previously. Echocardiography showed isolated anterior mitral leaflet perforation. Surgical findings confirmed the echocardiographic assessment.
August 2017: Clinical Case Reports
https://www.readbyqxmd.com/read/28766834/transseptal-puncture-using-surgical-electrocautery-in-children-and-adults-with-and-without-complex-congenital-heart-disease
#3
Srinath T Gowda, Athar M Qureshi, Daniel Turner, Nitin Madan, Justin Weigand, Richard Lorber, Harinder R Singh
BACKGROUND: Atrial transseptal puncture (TSP) for cardiac catheterization procedures remain challenging in children and adults with complex congenital heart disease (CHD). OBJECTIVES: We sought to evaluate our experience using radiofrequency (RF) current via surgical electrocautery needle for TSP to facilitate diagnostic and interventional procedures. METHODS: Retrospective chart review of all patients (pts) who underwent TSP using RF energy (10-25 W) via surgical electrocautery from three centers from January 2011 to January 2017 were evaluated...
August 2, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28765087/circardian-variability-patterns-predict-and-guide-premature-ventricular-contraction-ablation-procedural-inducibility-and-outcomes
#4
David Hamon, Guillaume Abehsira, Kai Gu, Albert Liu, Marie Blaye-Felice Sadron, Sophie Billet, Thomas Kambur, Mohammed Amer Swid, Noel G Boyle, Gopi Dandamudi, Philippe Maury, Minglong Chen, John M Miller, Nicolas Lellouche, Kalyanam Shivkumar, Jason S Bradfield
BACKGROUND: Infrequent intra-procedural premature ventricular complexes (PVCs) may impede radiofrequency catheter ablation (RFA) outcome and pharmacological induction is unpredictable. OBJECTIVE: To determine whether PVC circadian variation could help predict drug response. METHODS: Consecutive patients referred for RFA with detailed Holter monitoring and frequent monomorphic PVCs were included. Patients were divided into 3 groups based on hourly PVC count relationship to corresponding mean HR during each of the 24 hours on Holter: fast-HR-dependent PVC (F-HR-PVC) type for a positive correlation (Pearson, P<0...
July 29, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/28765086/spectrum-of-atrial-arrhythmias-using-the-ligament-of-marshall-in-patients-with-atrial-fibrillation
#5
Aman Chugh, Hitinder S Gurm, Kavita Krishnasamy, Mohammed Saeed, Watchara Lohawijarn, Kyle Hornsby, Ryan Cunnane, Hamid Ghanbari, Rakesh Latchamsetty, Thomas Crawford, Krit Jongnarangsin, Frank Bogun, Hakan Oral, Fred Morady
BACKGROUND: The role of the ligament of Marshall (LOM) in patients with atrial fibrillation (AF) has not been well defined. OBJECTIVE: The purpose of this study was to describe the role of the LOM in patients with AF and related arrhythmias. METHODS: Fifty-six patients (mean age 63 ± 11 years; persistent AF in 48 [86%]; ejection fraction 0.49 ± 0.13; left atrial diameter 4.7 ± 0.6 cm) with LOM-mediated arrhythmias were included. RESULTS: A LOM-pulmonary vein (PV) connection was present in 18 patients (32%) and was eliminated with radiofrequency (RF) ablation at the left lateral ridge or crux (n = 12), at the mitral annulus (n = 3), or with alcohol/ethanol (EtOH) ablation of the vein of Marshall (VOM; n = 3)...
July 29, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/28760258/cardiac-magnetic-resonance-aided-scar-dechanneling-influence-on-acute-and-long-term-outcomes
#6
David Andreu, Diego Penela, Juan Acosta, Juan Fernández-Armenta, Rosario J Perea, David Soto-Iglesias, Teresa M de Caralt, Jose T Ortiz-Perez, Susana Prat-González, Roger Borràs, Eduard Guasch, Jose María Tolosana, Lluis Mont, Antonio Berruezo
BACKGROUND: Late gadolinium enhancement cardiac magnetic resonance (LGE-CMR) provides tissue characterization of ventricular myocardium and scar that can be depicted as pixel signal intensity (PSI) maps. OBJECTIVE: To assess the possible benefit of guiding the ventricular tachycardia (VT) substrate mapping by integrating these PSI maps into the navigation system. METHODS: In total, 159 consecutive patients (66 ± 11 years old, 151 men [95%]) with scar-related left ventricular (LV) VT were included...
August 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/28750697/temperature-controlled-radiofrequency-ablation-for-pulmonary-vein-isolation-in-patients-with-atrial-fibrillation
#7
Jin Iwasawa, Jacob S Koruth, Jan Petru, Libor Dujka, Stepan Kralovec, Katerina Mzourkova, Srinivas R Dukkipati, Petr Neuzil, Vivek Y Reddy
BACKGROUND: Saline irrigation improved the safety of radiofrequency (RF) ablation, but the thermal feedback for energy titration is absent. OBJECTIVES: To allow temperature-controlled irrigated ablation, a novel irrigated RF catheter was designed with a diamond-embedded tip (for rapid cooling) and 6 surface thermocouples to reflect tissue temperature. High-resolution electrograms (EGMs) from the split-tip electrode allowed rapid lesion assessment. The authors evaluated the preclinical and clinical performance of this catheter for pulmonary vein (PV) isolation...
August 1, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28750317/advantages-of-cooled-fiber-for-monitoring-laser-tissue-ablation-through-temporal-and-spectral-analysis-of-rf-ultrasound-signal-a-case-study
#8
Simona Granchi, Enrico Vannacci, Luca Breschi, Elena Biagi
The promising minimally invasive laser thermal therapy technique may be improved if thermal lesions induced into the tissue can be carefully monitored in extension and morphology during the treatment. According to results obtained in several recent experimentations, solutions that avoid tissue carbonization during the treatment have been proposed, in order to allow deeper and longer lasting light penetration in treated tissue and to reduce failures of the applicator tip and fiber optic, dangerous for patients...
July 19, 2017: Ultrasonics
https://www.readbyqxmd.com/read/28747272/efficacy-and-safety-of-radiofrequency-ablation-for-focal-hepatic-lesions-adjacent-to-gallbladder-reconfiguration-of-the-ablation-zone-through-probe-relocation-and-ablation-time-reduction
#9
In Young Choi, Pyo Nyun Kim, Sung Gu Lee, Hyung Jin Won, Yong Moon Shin
PURPOSE: To evaluate the safety and efficacy of radiofrequency (RF) ablation for treatment of focal hepatic lesions adjacent to the gallbladder with electrode relocation and ablation time reduction. MATERIALS AND METHODS: Thirty-nine patients who underwent RF ablation for focal hepatic lesions adjacent to the gallbladder (≤ 10 mm) were evaluated retrospectively from January 2011 to December 2014 (30 men and 9 women; age range, 51-85 y; mean age, 65 y). Of 36 patients with hepatocellular carcinoma, 3 had a second treatment for recurrence (mean tumor size, 15 mm ± 6)...
July 23, 2017: Journal of Vascular and Interventional Radiology: JVIR
https://www.readbyqxmd.com/read/28745654/-analysis-of-corneal-biomechanical-changes-after-femtosecond-laser-assisted-laser-in-situ-keratomileusis-in-children-with-hyperopic-anisometropia
#10
I L Kulikova, O V Shlenskaya, N V Chapurin
AIM: to analyze corneal hysteresis (CH) and corneal resistance factor (RF) readings obtained with the Reichert Ocular Response Analyzer (ORA) before and after hyperopic femtolaser-assisted laser in situ keratomileusis (FS-LASIK) in children with anisometropia as well as to establish factors that may cause changes in these parameters. MATERIAL AND METHODS: CH and RF were evaluated before and 1.5 years after FS-LASIK performed on amblyopic eyes of 28 patients aged 6-14 years...
2017: Vestnik Oftalmologii
https://www.readbyqxmd.com/read/28744873/epicardial-ablation-of-tachyarrhythmia-in-children-experience-at-two-academic-centers
#11
Shailendra Upadhyay, Edward P Walsh, Frank Cecchin, John K Triedman, Juan Villafane, J Philip Saul
BACKGROUND: Experience with percutaneous epicardial ablation of tachyarrhythmia in pediatrics is limited. This case series addresses the feasibility, safety and complications of the procedure in children. METHODS: A total of 9 patients underwent 10 epicardial ablation procedures from 2002 to 2013 at two academic centers. Activation mapping was performed in all cases, and electro-anatomic map was utilized in 9 of the 10 procedures. Patients had undergone 1-3 failed endocardial catheter ablations in addition to medical management, and all had symptoms, a high-risk accessory pathway (AP), aborted cardiac arrest with Wolff-Parkinson-White syndrome (WPW) or ventricular dysfunction...
July 26, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28734985/safety-of-catheter-ablation-of-atrial-fibrillation-using-fiber-optic-based-contact-force-sensing
#12
Moussa Mansour, Dhanunjaya Lakkireddy, Douglas Packer, John D Day, Srijoy Mahapatra, Kyle Brunner, Vivek Reddy, Andrea Natale
BACKGROUND: While the body of evidence showing the benefit of contact force (CF)-sensing catheters in improving atrial fibrillation ablation success rate is growing, real-world safety data of this technology are limited. OBJECTIVE: The aim of this study was to report the complication rate in patients undergoing ablation using a specific CF-sensing catheter (TactiCath Quartz CF ablation catheter, Abbott, St. Paul, MN) in a large worldwide database. METHODS: User-reported adverse event data from January 2014 to December 2015 were reviewed for the ablation catheter...
July 20, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/28734848/liver-resection-versus-radiofrequency-ablation-plus-transcatheter-arterial-chemoembolization-in-cirrhotic-patients-with-solitary-large-hepatocellular-carcinoma
#13
Antonio Saviano, Roberto Iezzi, Felice Giuliante, Lucia Salvatore, Caterina Mele, Alessandro Posa, Francesco Ardito, Anna Maria De Gaetano, Maurizio Pompili
PURPOSE: To compare liver resection (LR) with single-step, balloon-occluded RF ablation plus drug-eluting embolics transarterial chemoembolization in cirrhotic patients with single hepatocellular carcinoma (HCC) ≥ 3 cm. MATERIALS AND METHODS: From 2010 to 2014, 25 patients with compensated cirrhosis and single HCC ≥ 3 cm (median size 4.5 cm; range, 3.0-6.8 cm) not suitable for LR or liver transplantation were treated with RF ablation plus transarterial chemoembolization in a prospective observational single-center pilot study; all patients had complete tumor necrosis after treatment...
July 19, 2017: Journal of Vascular and Interventional Radiology: JVIR
https://www.readbyqxmd.com/read/28730773/thermal-ablation-may-improve-outcomes-in-patients-with-colorectal-liver-metastasis-a-case-control-study
#14
Loukia S Poulou, Loukas Thanos, Panayiotis D Ziakas, Emmanouel Merikas, Apostolos Achimastos, Constantine Gennatas, Konstantinos N Syrigos
PURPOSE: Local thermal ablation may extend the scope of palliative therapy in patients with colorectal liver metastasis. We performed a retrospective, case-controlled study to compare patients with colorectal liver metastases that were treated with percutaneous radiofrequency (RF) or microwave (MW) thermal ablation, against the control group of chemotherapy alone. METHODS: We described baseline demographics, ablation sessions, procedure duration and related complications...
May 2017: Journal of B.U.ON.: Official Journal of the Balkan Union of Oncology
https://www.readbyqxmd.com/read/28726002/ultrasound-guided-radiofrequency-ablation-using-a-new-electrode-with-an-electromagnetic-position-sensor-for-hepatic-tumors-difficult-to-place-an-electrode-a-preliminary-clinical-study
#15
Tae Wook Kang, Min Woo Lee, Kyoung Doo Song, Hyunchul Rhim, Hyo Keun Lim, Wonseok Kang, Kyunga Kim
PURPOSE: To evaluate whether a new electrode embedded with an electromagnetic position sensor (EMPS) improves the technical feasibility of percutaneous radiofrequency ablation (RFA) in patients with hepatic tumors difficult to place an electrode under ultrasonography (US) guidance and to assess short-term therapeutic efficacy and safety. MATERIALS AND METHODS: This prospective study was approved by the institutional review board, and written informed consent was obtained from all patients...
July 19, 2017: Cardiovascular and Interventional Radiology
https://www.readbyqxmd.com/read/28717114/the-efficacy-of-isochronal-3d-mapping-based-ablation-of-ventricular-arrhythmia
#16
Masahito Suzuki, Junichi Nitta, Yosuke Hayashi, Kikou Lee, Keita Watanabe, Tatsuhiko Hirao, Nobutaka Kato, Yukihiro Inamura, Akira Sato, Masahiko Goya, Kenzo Hirao, Mitsuaki Isobe
Treatment of ventricular arrhythmias (VAs) commonly involves ablating sites showing electrograms with the earliest activity relative to the VA, but there is no threshold value for prematurity guaranteeing success. Ablation of sites with great prematurity can still result in failure.We hypothesized that isochronal map area (ISCA), derived from isochrones indicating electrogram prematurity, could help identify ablation targets in VA patients, as well as predict outcome. Specifically, we hypothesized that smaller ICSA for a given prematurity value would indicate a shallower arrhythmogenic focus leading to a higher likelihood of successful ablation...
August 3, 2017: International Heart Journal
https://www.readbyqxmd.com/read/28716699/bridge-to-success-a-better-method-of-cryoablation-for-atrioventricular-nodal-reentrant-tachycardia-in-children
#17
Charitha D Reddy, Scott R Ceresnak, Kara S Motonaga, Kishor Avasarala, Christine Feller, Anthony Trela, Debra Hanisch, Anne M Dubin
BACKGROUND: Cryoablation for AVNRT is associated with higher recurrence rates than radiofrequency ablation(RF). Junctional tachycardia marks procedural success with RF, but no such indicator exists for cryoablation. OBJECTIVE: To determine the impact of voltage mapping plus longer ablation lesions on mid-term success of cryoablation for children with AVNRT. METHODS: A single-center retrospective analysis was performed of pediatric patients with AVNRT who underwent cryoablation from 2011-2015...
July 14, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/28715071/the-influence-of-ablation-power-reduction-associated-with-esophagus-location-on-pulmonary-veins-isolation-results-in-patients-with-paroxysmal-atrial-fibrillation-six-month-follow-up
#18
Piotr Buchta, Krzysztof Myrda, Michał Skrzypek, Adam Wojtaszczyk, Barbara Budzyn, Mariusz Gąsior
BACKGROUND: Catheter ablation of atrial fibrillation (AF) could be associated with a thermal esophageal (EO) injury. To avoid this complication intraluminal esophageal temperature monitoring and ablation power reduction at the areas with excessive heating could be used. However, the reduced energy could limit the ablation lesion depth, without creation of consist transmural scar and influence on long-term ablation results. AIM: The primary goal was to evaluate the homogeneity of forced ablation power reduction due to excessive EO heating in different parts of left atrium...
July 17, 2017: Kardiologia Polska
https://www.readbyqxmd.com/read/28705474/rf-ablation-in-periventricular-heterotopia-related-epilepsy
#19
Massimo Cossu, Laura Mirandola, Laura Tassi
Drug-resistant focal epilepsy is a common occurrence in patients with gray matter nodular heterotopia (NH), and surgical treatment is often considered in these cases. NH-related epileptogenicity is sustained by complex networks, which may involve the nodules and extralesional cortex in various combinations. Therefore, invasive EEG is usually required to identify the structures involved in seizure generation. It has been reported that surgery may be effective in cases with unilateral lesions, whereas bilateral cases are not optimal candidates for surgical success...
July 3, 2017: Epilepsy Research
https://www.readbyqxmd.com/read/28705106/characteristic-features-of-patients-with-multiple-accessory-pathways
#20
Michal Orczykowski, Pawel Derejko, Piotr Urbanek, Robert Bodalski, Joanna Zakrzewska-Koperska, Maria Bilińska, Lukasz Szumowski
Objective Only limited clinical and electrophysiological data concerning patients (pts) with multiple accessory pathways (MAP) in comparison to large control groups are available. The aim of our study was to analyse these data from the largest cohort of patients with multiple accessory pathways and a large control group. Method and results We analysed data from pts with MAP (group 1) and pts with a single accessory pathway (AP) (group 2) referred for radiofrequency catheter ablation (RFCA) at our tertiary centre...
July 14, 2017: Acta Cardiologica
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