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Atrial fibrillation and ablation

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https://www.readbyqxmd.com/read/27933666/risk-of-stroke-and-recurrence-after-af-ablation-in-patients-with-an-initial-event-free-period-of-12-months
#1
Simon Kochhäuser, Pouria Alipour, Tanjah Haig-Carter, Kathleen Trought, Philip Hache, Yaariv Khaykin, Zaev Wulffhart, Alfredo Pantanomd, Bernice Tsang, David Birnie, Atul Verma
INTRODUCTION: Because of the unclear prognostic effects of ablation of atrial fibrillation (AF), oral anticoagulation (OAC) is often continued after ablation even in asymptomatic patients. We sought to determine the frequency of stroke and AF recurrence in patients on and off therapeutic OAC one year after a successful AF ablation. METHODS AND RESULTS: Patients that underwent AF ablation and were free of AF 12 months after ablation were selected from our AF database...
December 9, 2016: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/27931611/arrhythmogenic-right-ventricular-cardiomyopathy-clinical-course-and-predictors-of-arrhythmic-risk
#2
Andrea Mazzanti, Kevin Ng, Alessandro Faragli, Riccardo Maragna, Elena Chiodaroli, Nicoletta Orphanou, Nicola Monteforte, Mirella Memmi, Patrick Gambelli, Valeria Novelli, Raffaella Bloise, Oronzo Catalano, Guido Moro, Valentina Tibollo, Massimo Morini, Riccardo Bellazzi, Carlo Napolitano, Vincenzo Bagnardi, Silvia G Priori
BACKGROUND: Arrhythmogenic right ventricular cardiomyopathy (ARVC) is a leading cause of sudden cardiac death, but its progression over time and predictors of arrhythmias are still being defined. OBJECTIVES: This study sought to describe the clinical course of ARVC and occurrence of life-threatening arrhythmic events (LAE) and cardiovascular mortality; identify risk factors associated with increased LAE risk; and define the response to therapy. METHODS: We determined the clinical course of 301 consecutive patients with ARVC using the Kaplan-Meier method adjusted to avoid the bias of delayed entry...
December 13, 2016: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/27930603/strategies-to-improve-the-efficacy-of-epicardial-linear-ablation-on-the-beating-heart
#3
Yoshiyuki Watanabe, Matthew R Schill, Toshinobu Kazui, Spencer J Melby, Richard B Schuessler, Ralph J Damiano
OBJECTIVE: Creating transmural linear lesions on the beating heart is an important component of minimally invasive surgical ablation for atrial fibrillation. Animal studies have shown poor efficacy for surface bipolar radiofrequency ablation (RFA). Clinicians have developed strategies including multiple device applications and vena caval occlusion (VCO) to improve ablation efficacy. These techniques were evaluated in an acute porcine model. METHODS: In the first experiment, an RFA device was used to perform two 40-second epicardial ablations on the right atrium of six pigs...
December 7, 2016: Innovations: Technology and Techniques in Cardiothoracic and Vascular Surgery
https://www.readbyqxmd.com/read/27929207/rivaroxaban-vs-warfarin-for-anticoagulation-in-patients-with-atrial-fibrillation-undergoing-ablation-and-cardioversion
#4
Matthew Kendall Hawks, Carl Bryce
No abstract text is available yet for this article.
October 1, 2016: American Family Physician
https://www.readbyqxmd.com/read/27927211/genetic-variations-of-aldehyde-dehydrogenase-2-and-alcohol-dehydrogenase-1b-are-associated-with-the-etiology-of-atrial-fibrillation-in-japanese
#5
Yukiko Nakano, Hidenori Ochi, Yuko Onohara, Akinori Sairaku, Takehito Tokuyama, Hiroya Matsumura, Shunsuke Tomomori, Michitaka Amioka, Naoya Hironomobe, Chikaaki Motoda, Nozomu Oda, Kazuaki Chayama, Che-Hong Chen, Eric R Gross, Daria Mochly-Rosen, Yasuki Kihara
BACKGROUND: Alcohol consumption and oxidative stress are well-known risk factors for developing atrial fibrillation (AF). Single nucleotide polymorphisms (SNPs) of alcohol dehydrogenase (ADH1B) and aldehyde dehydrogenase 2 (ALDH2) genes encoding enzymes of alcohol and reactive aldehyde metabolism, respectively, are prevalent among East Asians. Here, we examined whether these SNPs were associated with AF in Japanese patients. METHODS AND RESULTS: Five hundred seventy-seven Japanese patients with AF undergoing catheter ablation and 1935 controls at Hiroshima University Hospital were studied...
December 7, 2016: Journal of Biomedical Science
https://www.readbyqxmd.com/read/27925337/complication-rates-of-catheter-ablation-of-atrial-fibrillation-in-patients-aged-%C3%A2-75-years-versus-75-years-results-from-the-german-ablation-registry
#6
J Moser, S Willems, D Andresen, J Brachmann, L Eckardt, E Hoffmann, K H Kuck, T Lewalter, B Schumacher, S G Spitzer, M Hochadel, J Senges, B A Hoffmann
INTRODUCTION: Despite a rising demand for catheter ablation (CA) of atrial fibrillation (AF) in an elderly population, complication and success rates are not fully elucidated. We sought to compare complication rates of CA of AF in patients ≥ 75 versus < 75 years of age. METHODS AND RESULTS: Patients with symptomatic, drug-refractory AF were prospectively enrolled from January 2007 to 2010 in this multicenter study. A total of 4449 patients, group 1 ≥ 75 years and group 2 < 75 years (n = 227, age 77...
December 7, 2016: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/27924066/assessment-of-atrial-electromechanical-interval-using-echocardiography-after-catheter-ablation-in-patients-with-persistent-atrial-fibrillation
#7
Xiaodong Chen, Minglong Chen, Yingying Wang, Bing Yang, Weizhu Ju, Fengxiang Zhang, Kejiang Cao
We sought to investigate variation of atrial electromechanical interval after catheter ablation procedure in patients with persistent atrial fibrillation using pulse Doppler (PW) and pulse tissue Doppler imaging (PW-TDI). A total of 25 consecutive in-patients with persistent atrial fibrillation, who restored sinus rhythm after ablation procedure, were recruited in our cardiac center. Echocardiography was performed on each patient at 2 hours, 1 day, 5 days, 1 month and 3 months after the ablation therapy, and atrial electromechanical delay was measured simultaneously by PW and PW-TDI...
November 2016: Journal of Biomedical Research
https://www.readbyqxmd.com/read/27921187/rotor-tracking-using-phase-of-electrograms-recorded-during-atrial-fibrillation
#8
Caroline H Roney, Chris D Cantwell, Norman A Qureshi, Rasheda A Chowdhury, Emmanuel Dupont, Phang Boon Lim, Edward J Vigmond, Jennifer H Tweedy, Fu Siong Ng, Nicholas S Peters
Extracellular electrograms recorded during atrial fibrillation (AF) are challenging to interpret due to the inherent beat-to-beat variability in amplitude and duration. Phase mapping represents these voltage signals in terms of relative position within the cycle, and has been widely applied to action potential and unipolar electrogram data of myocardial fibrillation. To date, however, it has not been applied to bipolar recordings, which are commonly acquired clinically. The purpose of this study is to present a novel algorithm for calculating phase from both unipolar and bipolar electrograms recorded during AF...
December 5, 2016: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/27920836/successful-cryoballoon-pulmonary-vein-isolation-in-a-patient-with-situs-inversus-and-dextrocardia
#9
Yasuhiro Yoshiga, Akihiko Shimizu, Takeshi Ueyama, Makoto Ono, Tomoko Fumimoto, Hironori Ishiguchi, Masafumi Yano
A 79-year-old man with situs inversus and dextrocardia underwent catheter ablation of symptomatic paroxysmal atrial fibrillation. Pulmonary vein isolation (PVI), using second-generation cryoballoon under Ensite NavX system guidance, was performed successfully in a reverse manner, which required short procedure and fluoroscopy times, as required in a PVI performed on a normal heart without any complications. Cryoballoon-based PVI under Ensite NavX guidance was feasible and safe to achieve a favorable outcome in this patient with abnormal anatomy...
December 2016: Journal of Arrhythmia
https://www.readbyqxmd.com/read/27919928/impact-of-surgical-ablation-of-atrial-fibrillation-on-the-progression-of-tricuspid-regurgitation-and-right-sided-heart-remodeling-after-mitral-valve-surgery-a-propensity-score-matching-analysis
#10
Jiangang Wang, Jie Han, Yan Li, Qing Ye, Fei Meng, Tiange Luo, Baiyu Tian, Haibo Zhang, Yixin Jia, Wen Zeng, Chunlei Xu, Wei Han, Yuqing Jiao, Xu Meng
BACKGROUND: This study assessed the role of surgical ablation for atrial fibrillation (AF) in decreasing tricuspid regurgitation (TR) and right-sided heart remodeling in patients after mitral valve procedure. METHODS AND RESULTS: Between 1994 and 2014, 1568 consecutive patients with AF undergoing mitral valve procedure were identified. In 26.0% (n=408), surgical ablation of AF was used. Propensity-score matching (PSM) was performed on the basis of 41 known perioperative risk variables...
December 5, 2016: Journal of the American Heart Association
https://www.readbyqxmd.com/read/27919764/postoperative-atrial-tachycardias-following-mitral-valve-surgery-mechanisms-and-outcomes-of-catheter-ablation
#11
Andres Enriquez, Pasquale Santangeli, Erica Zado, Jackson Liang, Simon Castro, Fermin Garcia, Robert Schaller, Gregory Supple, David Frankel, David Callans, David Lin, Sanjay Dixit, Rajat Deo, Michael Riley, Francis Marchlinski
BACKGROUND: Atrial tachycardias (ATs) including atrial fibrillation (AF) are common arrhythmias late after mitral valve (MV) surgery and their management is challenging. OBJECTIVE: To determine the electrophysiological mechanisms of ATs in patients with prior MV surgery and the long-term outcomes of catheter ablation. METHODS: We studied 67 consecutive patients (age 59.4±10.6 years, 41 male) with a history of MV surgery who presented with ATs post-operatively between 2007-2015...
December 2, 2016: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/27917710/peri-procedural-anticoagulation-in-catheter-ablation-for-atrial-fibrillation-a-review
#12
Dimitrios A Vrachatis, Georgios Giannopoulos, Charalambos Kossyvakis, Panagopoulou Vasiliki, Manolis Vavuranakis, Theodore G Papaioannou, Stamatina Pagoni, Vlasios N Pyrgakis, Michael W Cleman, Spyridon G Deftereos
Catheter ablation for rhythm control in atrial fibrillation has been recognized as an established treatment. Patients with atrial fibrillation suffer from an increased risk from thromboembolic events. Long-term stroke risk and mortality has been shown to be reduced after catheter ablation, still the procedure per se is associated with an additive peri-procedural thromboembolic risk. Maintenance of the thrombotic - bleeding equilibrium in such patients during interventional procedures is compelling. Lack of data from randomized studies along with the recent introduction of novel oral anticoagulants in clinical practice has resulted in a wide variance of antithrombotic treatment approaches...
December 5, 2016: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/27915264/three-dimensional-rotational-angiography-of-the-left-atrium-and-the-oesophagus-the-short-term-mobility-of-the-oesophagus-and-the-stability-of-the-fused-three-dimensional-model-of-the-left-atrium-and-the-oesophagus-during-catheter-ablation-for-atrial-fibrillation
#13
Zdenek Starek, Frantisek Lehar, Jiri Jez, Martin Scurek, Jiri Wolf, Tomas Kulik, Alena Zbankova, Miroslav Novak
AIMS: The objective of this study was to evaluate the mobility of the oesophagus and the stability of the three-dimensional (3D) model of the oesophagus using 3D rotational angiography (3DRA) of the left atrium (LA) and the oesophagus, fused with live fluoroscopy during catheter ablation for atrial fibrillation. METHODS AND RESULTS: From March 2015 to September 2015, 3DRA of the LA and the oesophagus was performed in 33 patients before catheter ablation for atrial fibrillation...
December 2, 2016: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/27912983/hypertrophic-obstructive-cardiomyopathy
#14
REVIEW
Josef Veselka, Nandan S Anavekar, Philippe Charron
Hypertrophic obstructive cardiomyopathy is an inherited myocardial disease defined by cardiac hypertrophy (wall thickness ≥15 mm) that is not explained by abnormal loading conditions, and left ventricular obstruction greater than or equal to 30 mm Hg. Typical symptoms include dyspnoea, chest pain, palpitations, and syncope. The diagnosis is usually suspected on clinical examination and confirmed by imaging. Some patients are at increased risk of sudden cardiac death, heart failure, and atrial fibrillation...
November 29, 2016: Lancet
https://www.readbyqxmd.com/read/27910092/management-of-atrial-fibrillation-in-elderly-adults
#15
Yaanik Desai, Mikhael F El-Chami, Angel R Leon, Faisal M Merchant
Driven in large part by the aging of the population and the increasing prevalence of cardiovascular comorbidities associated with atrial fibrillation (AF), there is a burgeoning epidemic of AF in elderly adults. Although there is a large body of literature to guide management of people with AF, elderly adults with AF are frequently underrepresented in clinical trials. This review provides a contemporary update on management of elderly adults with AF with a particular focus on the two main clinical challenges that AF poses: stroke risk reduction and control of symptoms...
December 2, 2016: Journal of the American Geriatrics Society
https://www.readbyqxmd.com/read/27910083/radiofrequency-catheter-ablation-of-accessory-pathways-in-patients-with-ebstein-s-anomaly-at-8-years-of-follow-up
#16
Michał Orczykowski, Paweł Derejko, Robert Bodalski, Piotr Urbanek, Joanna Zakrzewska-Koperska, Radosław Sierpiński, Katarzyna Kalin, Andrzej Hasiec, Grzegorz Warmiński, Maria Miszczak-Knecht, Katarzyna Bieganowska, Rafał Baranowski, Maria Bilińska, Elżbieta Biernacka, Piotr Hoffman, Łukasz Szumowski
BACKGROUND: Data regarding long-term follow-up of radiofrequency catheter ablation (RFCA) of accessory pathways (APs) in patients with Ebstein's anomaly (EA) are limited. The procedures are challenging due to multiple or wide APs. METHODS: Analysis was performed on clinical and periprocedural data of patients with EA referred to the centre in order to perform catheter ablation of accessory pathway (AP). The group consisted of 22 patients (female 40.9%, mean age 33...
December 2, 2016: Cardiology Journal
https://www.readbyqxmd.com/read/27909538/pulmonary-vein-remodeling-following-atrial-fibrillation-ablation-implications-for-the-radiographic-diagnosis-of-pulmonary-vein-stenosis
#17
Faisal M Merchant Md, Mathew R Levy Bs, Shahriar Iravanian Md, Ramal M Weragoda Md, Edward C Clermont Md, Heval M Kelli Md, Robert L Eisner PhD, David Vadnais Md, Mikhael F El-Chami Md, Angel R Leon Md, David B Delurgio Md
Background: Pulmonary vein (PV) reverse remodeling has been recognized following atrial fibrillation (AF) ablation. However, the extent of physiologic reverse remodeling after AF ablation and the potential impact of reverse remodeling on the radiographic diagnosis of PV stenosis have not been well characterized. Methods: From January 2004 to February 2014, 186 patients underwent paired cardiac magnetic resonance imaging (MRI) to delineate PV orifice dimensions before and after (mean 109 ± 61 days) an initial AF ablation...
August 2016: Journal of Atrial Fibrillation
https://www.readbyqxmd.com/read/27909534/efficacy-and-safety-of-implantable-loop-recorder-experience-of-a-center
#18
Inês Silveira, Maria João Sousa, Nuno Antunes, Vânia Silva, Carla Roque, António Pinheiro-Vieira, Vítor Lagarto, António Hipólito-Reis, André Luz, Severo Torres
Introduction: Symptoms like syncope or palpitations frequently present a diagnostic challenge. An implantable loop recorder (ILR) is an important aid in the management of these patients. Methods: A retrospective study of patients that underwent ILR implantation from November 2007 to 2014. For each patient the indication for implantation, baseline characteristics, previous study, complications, recorded tracing and interventions were evaluated. Results: A total of 62 patients were included, 50% men, with a mean age of 62...
August 2016: Journal of Atrial Fibrillation
https://www.readbyqxmd.com/read/27909526/achieving-bidirectional-long-delays-in-pulmonary-vein-antral-lines-prior-to-bidirectional-block-in-patients-with-paroxysmal-atrial-fibrillation-the-bi-bi-technique-for-atrial-fibrillation-ablation
#19
Adel F Mina Md Facc Fhrs, Nicholas L Warnecke Pa-C
Background: Pulmonary Vein Antral isolation (PVAI) is currently the standard of care for both paroxysmal and persistent atrial fibrillation ablation. Reconnection to the pulmonary vein is the most common cause of recurrence of atrial fibrillation. Achieving the endpoint of bidirectional block (BDB) for cavotricuspid isthmus dependant flutter has improved our outcomes for atrial flutter ablation. With this we tried to achieve long delays in the pulmonary veins antral lines prior to complete isolation comparable to those delays found in patient with bidirectional block of atrial flutter lines...
August 2016: Journal of Atrial Fibrillation
https://www.readbyqxmd.com/read/27909525/quality-measures-in-atrial-fibrillation-therapy-af-ablation-and-get-with-the-guidelines-afib-registries
#20
EDITORIAL
Dhanunjaya Lakkireddy Md, Andrea Natale Md
No abstract text is available yet for this article.
June 2016: Journal of Atrial Fibrillation
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