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Vein ablation

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https://www.readbyqxmd.com/read/28545282/-electrocardiogram-characteristics-of-patients-with-ventricular-arrhythmia-originating-from-the-distal-great-cardiac-vein
#1
R L Zheng, D P Zhou, J X Lin, Y C Li, J Li, J Li, R P Yin, J F Lin
Objective: To explore the electrocardiographic characteristics of patients with idiopathic ventricular arrhythmias (VAs) originating from different portions of distal great cardiac veins (DGCV). Methods: The study included 49 patients underwent successful RFCA of premature ventricular complex(PVCs)/ventricular tachycardia(VT) from different portions of the DGCV in our department from July 2009 to March 2016. The surface 12-lead electrocardiogram (ECG) and intraventricular ablation mapping features were analyzed...
April 24, 2017: Zhonghua Xin Xue Guan Bing za Zhi
https://www.readbyqxmd.com/read/28545098/survival-and-prognostic-factors-for-patients-with-advanced-hepatocellular-carcinoma-after-stereotactic-ablative-radiotherapy
#2
Cheng-Hsiang Lo, Jen-Fu Yang, Ming-Yueh Liu, Yee-Min Jen, Chun-Shu Lin, Hsing-Lung Chao, Wen-Yen Huang
OBJECTIVE: To evaluate the survival outcomes and prognostic factors of patients with advanced hepatocellular carcinoma (HCC) who underwent stereotactic ablative radiotherapy (SABR). METHODS: This retrospective study evaluated patients with advanced HCC who underwent SABR between December 2007 and July 2015. All patients had Barcelona Clinic Liver Cancer stage C disease and Child-Turcotte-Pugh (CTP) class A-B function. In-field control (IFC), overall survival (OS), prognostic factors, and toxicity were evaluated...
2017: PloS One
https://www.readbyqxmd.com/read/28543788/automated-verification-of-pulmonary-vein-isolation-in-radiofrequency-and-cryoballoon-guided-ablation
#3
Jan De Pooter, Thomas Phlips, Milad El Haddad, Frederic van Heuverswyn, Liesbeth Timmers, René Tavernier, Sebastien Knecht, Yves Vandekerckhove, Mattias Duytschaever
BACKGROUND: Verification of pulmonary vein isolation (PVI) can be challenging due to the coexistence of pulmonary vein potentials (PVP) and far field potentials. This study aimed to prospectively validate a novel algorithm for automated verification of PVI in radiofrequency-guided (RF) and cryoballoon-guided (CB) ablation strategies. METHODS: A dataset of 620 (RF: 516 EGMs and CB: 104 EGMs) bipolar electrograms (EGM), recorded by circular mapping catheter (CMC) placed at the left atrium-pulmonary vein (PV) junction, were prospectively analyzed by a two-step algorithm...
May 25, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28543103/comparison-between-local-and-systemic-injection-of-adenosine-for-detecting-dormant-conduction-after-pv-isolation
#4
Myung-Jin Cha, Eue-Keun Choi, Seil Oh
BACKGROUND: Adenosine administration after pulmonary vein (PV) isolation is effective for identifying dormant conduction (DC). We aimed to compare the efficacy and safety of local injection of adenosine into the PV with systemic intravenous injection. METHODS: After complete PV isolation was performed, adenosine was injected directly into the PV (local method; 6-18 mg) and the femoral vein (systemic method, 12-30 mg) sequentially. We compared the incidence of DC and the hemodynamic effect of adenosine between the methods...
May 24, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28540784/safety-and-efficacy-of-radiofrequency-assisted-alpps-ralpps-in-patients-with-cirrhosis-related-hepatocellular-carcinoma
#5
Qiang Wang, Jun Yan, Xiaobin Feng, Geng Chen, Feng Xia, Xiaowu Li, Kuansheng Ma, Ping Bie
BACKGROUND AND AIMS: Associating liver partition and portal vein ligation for staged hepatectomy (ALPPS) has high morbidity and mortality. In this study, the safety and efficacy of a modification of ALPPS (radiofrequency-assisted ALPPS, RALPPS) were assessed in patients with hepatocellular carcinoma (HCC). MATERIALS AND METHODS: Patients who were diagnosed with HCC and were considered to have an insufficient future liver remnant (FLR) were enrolled. In stage I, a radiofrequency ablation (RFA) device was used to cauterise along the planned transection plane to form a coagulum avascular area...
March 23, 2017: International Journal of Hyperthermia
https://www.readbyqxmd.com/read/28536917/comparison-of-early-outcomes-of-surgical-ablation-procedures-for-atrial-fibrillation-concomitant-to-non-mitral-cardiac-surgery-a-japan-adult-cardiovascular-surgery-database-study
#6
Hideaki Takai, Hiroaki Miyata, Noboru Motomura, Kenichi Sasaki, Takashi Kunihara, Shinichi Takamoto
OBJECTIVE: Although the benefit of surgical ablation for atrial fibrillation (AF) performed concomitant to mitral valve surgery is established, whether that performed concomitant to non-mitral cardiac surgery is beneficial remains unclear. In non-mitral, non-left-atriotomy cardiac surgery, the optimal surgical approach for AF remains to be established. Therefore, using the Japan Adult Cardiovascular Surgery Database (JACVSD), we compared 2 surgical ablation procedures [the maze procedure and pulmonary vein isolation (PVI)] performed concomitant to non-mitral cardiac surgery...
May 23, 2017: General Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28534651/tert-butylhydroquinone-promotes-angiogenesis-and-improves-heart-functions-in-rats-after-myocardial-infarction
#7
Nan-Qian Zhou, Ning Liu, Peng Li, Song Ping, Qi-Sheng Peng, Wei-Dong Shi
BACKGROUND: Hypertension is an increased risk of heart failure and acute myocardial infarction (MI). Tert-butylhydroquinone (tBHQ), as an antioxidant, shows multiple cardioprotective actions including the reduction in blood pressure. The aim of this study was to investigate whether and how tBHQ improves heart functions in rats. METHODS: The MI model was established in WKY and spontaneously hypertensive rats (SHRs) by ligation of left anterior descending coronary artery...
May 23, 2017: Clinical and Experimental Hypertension: CHE
https://www.readbyqxmd.com/read/28532773/comparison-of-the-incidences-of-complications-after-second-generation-cryoballoon-ablation-of-atrial-fibrillation-using-vitamin-k-antagonists-versus-novel-oral-anticoagulants
#8
Giacomo Mugnai, Carlo de Asmundis, Saverio Iacopino, Erwin Stroker, Massimo Longobardi, Valentina De Regibus, Hugo Enrique Coutino-Moreno, Ken Takarada, Rajin Choudhury, Juan Pablo Abugattas de Torres, Cesare Storti, Pedro Brugada, Gian-Battista Chierchia
Data evaluating the impact of the periprocedural administration of novel oral anticoagulants (NOACs) on complications in the setting of pulmonary vein (PV) isolation using cryoballoon (CB) is limited. In the present study, our aim was to analyze procedural characteristics and incidence of complications in those patients who underwent CB ablation for atrial fibrillation and the impact of NOACs on adverse events compared with vitamin K antagonists (VKAs). Consecutive patients with drug resistant atrial fibrillation who underwent PV isolation by CB as index procedure were retrospectively included in our analysis...
April 27, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28523369/-new-strategies-and-technologies-for-ablation-of-atrial-fibrillation-where-do-we-go
#9
A Metzner, J Riedl, K-H Kuck
Catheter-based ablation is an established treatment option for patients with symptomatic atrial fibrillation (AF). Pulmonary vein isolation is the established cornerstone of all ablation strategies. However, the rate of electrical reconduction of previously isolated pulmonary veins is high and associated with recurrence of AF. Novel and innovative mapping and ablation systems are being developed or are under clinical evaluation aiming for higher durability of pulmonary vein isolation. Additional ablation strategies for patients with recurrence of AF despite persistent isolation of the pulmonary veins are under evaluation...
May 18, 2017: Herz
https://www.readbyqxmd.com/read/28523345/endovenous-laser-ablation-therapy-in-children-applications-and-outcomes
#10
Premal A Patel, Alex M Barnacle, Sam Stuart, Joao G Amaral, Philip R John
BACKGROUND: Endovenous laser ablation is well recognized as the first-line treatment for superficial venous reflux with varicose veins in adults. It is not widely reported and is not an established practice in pediatric patients. OBJECTIVE: To illustrate a variety of pediatric venous conditions in which endovenous laser ablation can be utilized and to demonstrate its feasibility and safety in children. MATERIALS AND METHODS: We conducted a retrospective review of endovenous laser ablation procedures performed between January 2007 and July 2014 at two large pediatric institutions...
May 18, 2017: Pediatric Radiology
https://www.readbyqxmd.com/read/28514791/impact-of-targeting-adenosine-induced-transient-venous-reconnection-in-patients-undergoing-pulmonary-vein-isolation-for-atrial-fibrillation-a-meta-analysis-of-3524-patients
#11
Alessandro Blandino, Giuseppe Biondi-Zoccai, Alberto Battaglia, Stefano Grossi, Francesca Bianchi, Maria Rosa Conte, Francesco Rametta, Fiorenzo Gaita
AIMS: Atrial fibrillation recurrences after pulmonary vein isolation (PVI) are not uncommon and are frequently related to pulmonary vein reconnection. Adenosine/ATP can reveal dormant pulmonary vein conduction after PVI. Previous studies revealed that adenosine-guided Additional ablation could improve arrhythmia-free survival. We performed a meta-analysis to assess the impact of additional ablation to eliminate adenosine-induced transient pulmonary vein reconnection in terms of atrial fibrillation recurrence at follow-up...
July 2017: Journal of Cardiovascular Medicine
https://www.readbyqxmd.com/read/28513287/contact-force-technology-integrated-with-3d-navigation-system-for-atrial-fibrillation-ablation-improving-results
#12
Roberto Rordorf, Antonio Sanzo, Vincenzo Gionti
Pulmonary veins isolation (PVI) by radiofrequency (RF) ablation is currently an established treatment for symptomatic, drug-resistant paroxysmal atrial fibrillation. Although the effectiveness of the therapy has been clearly demonstrated, success rate after a single procedure is still sub-optimal. The main reason for recurrences after PVI is electrical pulmonary vein-atrium reconnection. In order to increase the likelihood of permanent PVI, the creation of a transmural, durable lesion is mandatory. The main determinants of lesion size and transmurality are power, stability, duration and contact-force during RF application...
May 17, 2017: Expert Review of Medical Devices
https://www.readbyqxmd.com/read/28513211/image-quality-of-low-radiation-dose-left-atrial-ct-using-filtered-back-projection-and-an-iterative-reconstruction-algorithm-intra-individual-comparison-in-unselected-patients-undergoing-pulmonary-vein-isolation
#13
Ute Lina Fahlenkamp, Ivan Diaz Ramirez, Moritz Wagner, Carsten Schwenke, Alexander Huppertz, Bernd Hamm, Alexander Lembcke
Background Computed tomography (CT) of the left atrium (LA) is performed prior to pulmonary vein isolation (PVI) to improve success of circumferential ablation for atrial fibrillation. The ablation procedure itself exposes patients to substantial radiation doses, therefore radiation dose reduction in pre-ablational imaging is of concern. Purpose To assess and compare diagnostic performance of low-radiation dose preprocedural CT in patients scheduled for PVI using two types of reconstruction algorithms. Material and Methods Forty-six patients (61 ± 10 years) scheduled for PVI were enrolled in this study irrespective of body-mass-index or cardiac rhythm at examination...
January 1, 2017: Acta Radiologica
https://www.readbyqxmd.com/read/28512102/uncommon-presentation-of-adult-form-scimitar-syndrome-associated-with-single-left-pulmonary-vein-in-a-pregnant-woman
#14
Sarah Ali Althomali, Ashraf Ahmad Alhefny, Mohammad Salih Almalki
Scimitar syndrome is the constellation of malformations including an abnormal venous drainage of the right lung into the inferior vena cava, associated with the right lung and systemic supply to the right lung. The anomalous vein looks like the curved, Turkish sword (scimitar), hence the name.The adult form of scimitar syndrome is rare, and it is usually an incidental diagnosis based on the characteristic finding on radiological imaging since the patients are usually asymptomatic or with minimal symptoms.Our patient presented with a rare presentation of scimitar syndrome, which is tachyarrhythmia (sinus tachycardia, with episodes of supraventricular tachycardia)...
May 15, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28506548/antiarrhythmic-medication-is-superior-to-catheter-ablation-in-suppressing-supraventricular-ectopic-complexes-in-patients-with-atrial-fibrillation
#15
Christina Alhede, Trine K Lauridsen, Arne Johannessen, Ulrik Dixen, Jan S Jensen, Pekka Raatikainen, Gerhard Hindricks, Haakan Walfridsson, Ole Kongstad, Steen Pehrson, Anders Englund, Juha Hartikainen, Peter S Hansen, Jens C Nielsen, Christian Jons
BACKGROUND: Supraventricular ectopic complexes (SVEC) originating in the pulmonary veins are known triggers of atrial fibrillation (AF) which led to the development of pulmonary vein isolation for AF. However, the long-term prevalence of SVEC after catheter ablation (CA) as compared to antiarrhythmic medication (AAD) is unknown. Our aims were to compare the prevalence of SVEC after AAD and CA and to estimate the association between baseline SVEC burden and AF burden during 24months of follow-up...
May 10, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28501100/comparison-of-direct-current-synchronized-cardioversion-to-ibutilide-guided-catheter-ablation-for-long-term-sinus-rhythm-maintenance-after-isolated-pulmonary-vein-isolation-of-persistent-atrial-fibrillation
#16
Maojing Wang, Qing Zhao, Wei Ding, Shanglang Cai
Use of the antiarrhythmic ibutilide after isolated pulmonary vein isolation (PVI) might distinguish atrial remodeling severity and cases requiring further substrate modification, thereby improving efficacy of persistent atrial fibrillation (AF) treatment. Ninety-six consecutive patients with persistent AF were randomized after PVI to either direct current synchronized cardioversion (DCC group, n = 48) or 1 mg of intravenous ibutilide (ibutilide group, n = 48) followed by no further intervention if AF converted to sinus rhythm (SR) within 30 minutes (ibutilide conversion subgroup) or by complex fractionated atrial electrogram (CFAE) ablation until SR recovery or complete CFAE elimination (ibutilide nonconversion subgroup)...
March 29, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28500479/-catheter-ablation-of-persistent-atrial-fibrillation-where-do-we-go
#17
C Lemeš, K-H Kuck, S Mathew
Despite the very promising initial results of clinical studies, catheter ablation of persistent atrial fibrillation (AF) remains a challenge in modern electrophysiology. On the basis of the hypothesized pathophysiological mechanisms, a variety of ablation strategies have been developed over the course of time. The current ablation strategies range from pulmonary vein isolation (PVI) alone as first-line therapy, through ablation of multiple linear lesions, ablation of complex fractionated atrial electrograms (CFAE), rotor ablation, isolation of fibrotic and scar tissue up to isolation of the left atrial appendage (LAA); however, it is unclear even to the present day whether these complex and time-consuming strategies actually improve the success rate of ablation therapy...
May 12, 2017: Herz
https://www.readbyqxmd.com/read/28497857/validation-of-electrical-ostial-pulmonary-vein-isolation-verified-with-a-spiral-inner-lumen-mapping-catheter-during-second-generation-cryoballoon-ablation
#18
Shinsuke Miyazaki, Takatsugu Kajiyama, Tomonori Watanabe, Hiroshi Taniguchi, Hiroaki Nakamura, Rikuta Hamaya, Shigeki Kusa, Miyako Igarashi, Hitoshi Hachiya, Kenzo Hirao, Yoshito Iesaka
BACKGROUND: Achieve catheters are cryoballoon guidewires that enable pulmonary vein (PV) potential mapping. The single catheter approach in conjunction with the Achieve catheter is currently standard practice in second-generation cryoballoon ablation, yet circumferential mapping catheters are the gold standard for evaluating PV isolation (PVI). The study sought to validate the ostial PVI verified by an Achieve catheter alone. METHODS: One-hundred fifty-one paroxysmal atrial fibrillation patients undergoing PVI using exclusively 28-mm second-generation cryoballoons were enrolled...
May 12, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/28496936/strategies-to-improve-safety-and-efficacy-of-atrial-fibrillation-ablation-using-electrode-multipolar-phased-rf-pvac%C3%A2-catheter-a-case-report
#19
Fabio Dorfman, Cristiano Dietrich, Paulo Costa, Evandro Sbaraini, Rafael Abt, Dalmo Moreira, Cézar Mesas
Phased radiofrequency ablation with a single catheter technique, using a 9-electrode circumferential catheter, is a viable approach to pulmonary vein isolation for the treatment of atrial fibrillation. However, creating effective transmural lesions with such technique, while avoiding serious complications like atrioesophageal fistula, can be difficult. This case illustrates a challenging scenario, where catheter maneuvers fail to allow safe radiofrequency delivery, due to esophageal temperature rise, despite extensive navigating maneuvers...
October 2016: Journal of Atrial Fibrillation
https://www.readbyqxmd.com/read/28496934/catheter-ablation-for-persistent-and-long-standing-persistent-atrial-fibrillation
#20
REVIEW
Martin Fiala
Persistent and long-standing persistent atrial fibrillation evolves from complex arrhythmogenic substrate and sources. Multiple studies have shown improved freedom from arrhythmia recurrences if sinus rhythm had been restored during the index ablation; however, such harder procedural endpoint requires laborious stepwise approach almost invariably pursuing non-pulmonary-vein sources. Longer-term conversion of persistent atrial fibrillation into sinus rhythm is associated with significant improvement in major indices of hemodynamic and functional status; these indices also represent major predictors of cardiovascular mortality...
October 2016: Journal of Atrial Fibrillation
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