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Journal of Cardiovascular Electrophysiology

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https://www.readbyqxmd.com/read/29149516/feasibility-of-percutaneous-left-atrial-appendage-closure-using-a-novel-lambre-occluder-in-patients-with-atrial-fibrillation-initial-results-from-a-prospective-cohort-registry-study
#1
Shaojie Chen, Boris Schmidt, Stefano Bordignon, Fabrizio Bologna, Takahiko Nagase, Nikolaos Tsianakas, Laura Perrotta, K R Julian Chun
BACKGROUND: The LAmbreۛ occluder is a novel device for percutaneous left atrial appendage closure (LAAC). The presented study aimed to report the initial experience in implantation of the novel LAmbre for LAAC in patients with non-valvular AF. METHODS: We conducted a prospective, observational, cohort registry study to evaluate the feasibility of percutaneous LAAC using the LAmbre occlude. RESULTS: Thirty patients (15 female, mean age 77...
November 17, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29149500/ep-radiofrequency-generators-significant-offsets-between-selected-and-delivered-power
#2
Felix Bourier, Bernhard Schwarz, Amir Brkic, Lara Wolf, Verena Semmler, Marc Kottmaier, Elena Risse, Marta Telishevska, Stephanie Brooks, Sarah Lengauer, Marielouise Kornmayer, Katharina Koch-Büttner, Florian Berger, Gabriele Hessling, Isabel Deisenhofer, Tilko Reents
INTRODUCTION: For radiofrequency ablation, the EP Shuttle®, Ampere®, and SmartAblate® generator models are most frequently used in clinical practice. The aim of this study was to assess the correlation between selected and delivered RF power for different generators. METHODS AND RESULTS: In an experimental setup, ablation catheters were connected to the EP Shuttle®, Ampere®, and SmartAblate® generators. The power delivered by the generators was measured using a current converter and an oscilloscope...
November 17, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29131449/mechanical-power-sheath-mediated-recanalization-and-lead-implantation-in-patients-with-venous-occlusion-technique-and-results
#3
Olivier A Witte, Ahmet Adiyaman, Marnix W van Bemmel, Jaap Jan J Smit, Abdul Ghani, Anand R Ramdat Misier, Arif Elvan, Peter Paul Hm Delnoy
INTRODUCTION: Chronic venous occlusion hampers lead revisions and upgrades in patients with a cardiac implantable electronic devices (CIEDs). This can make cardiothoracic surgery, venoplasty or contra-lateral implantation of leads with tunneling necessary. A technique using venous recanalization may be a preferred alternative. We assessed the efficacy and safety of this new technique. METHODS AND RESULTS: From 2009-2016 all consecutive patients planned for lead revision or upgrade with known chronic venous occlusion were studied...
November 13, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29131442/increased-rates-of-atrial-fibrillation-recurrence-following-pulmonary-vein-isolation-in-overweight-and-obese-patients
#4
Bhradeev Sivasambu, Muhammad A Balouch, Tarek Zghaib, Rizma J Bajwa, Jonathan Chrispin, Ronald D Berger, Hiroshi Ashikaga, Saman Nazarian, Joseph E Marine, Hugh Calkins, David D Spragg
INTRODUCTION: Catheter ablation is common for patients with symptomatic, drug-refractory atrial fibrillation (AF). Obesity is a known risk factor for incident AF. The impact of obesity on AF ablation outcomes is incompletely understood. We sought to determine the impact of elevated body mass index (BMI) on pulmonary vein isolation (PVI) procedural outcomes and associated complications. METHODS AND RESULTS: We evaluated patients undergoing PVI from 2001 to 2015, dividing them into four groups: normal weight (BMI ≥ 18...
November 13, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29131434/five-year-impact-of-catheter-ablation-for-atrial-fibrillation-in-patients-with-a-prior-history-of-stroke
#5
T Jared Bunch, Heidi T May, Tami L Bair, Brian G Crandall, Michael J Cutler, John D Day, Victoria Jacobs, Charles Mallender, Jeffrey S Osborn, J Peter Weiss
BACKGROUND: Catheter ablation of atrial fibrillation(AF) is an established therapeutic rhythm approach. Patients with a prior history of a stroke(CVA) represent a unique high-risk population for recurrent thromboembolic events. The role of antiarrhythmic treatment on the natural history of stroke recurrence in these patients is not fully understood. METHODS: Three patient groups with a prior CVA and 5 years of follow-up were matched 1:3:3 by propensity score(±0...
November 13, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29125704/left-atrial-ejection-force-predicts-the-outcome-after-catheter-ablation-for-paroxysmal-atrial-fibrillation
#6
Hideyuki Kishima, Takanao Mine, Satoshi Takahashi, Kenki Ashida, Masaharu Ishihara, Tohru Masuyama
INTRODUCTION: Left atrium (LA) systolic dysfunction is observed in the early stages of atrial fibrillation (AF) prior to LA anatomical change. We investigated whether LA systolic dysfunction predicts recurrent AF after catheter ablation (CA) in patients with paroxysmal AF. METHODS AND RESULTS: We studied 106 patients who underwent CA for paroxysmal AF. LA systolic function was assessed with the LA emptying volume = Maximum LA volume (LAVmax) - Minimum LA volume (LAVmin), LA emptying fraction = [(LAVmax - LAVmin) / LAVmax] × 100, and LA ejection force calculated with Manning`s method [LA ejection force = (0...
November 10, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29124829/anatomical-and-electrical-remodeling-with-incomplete-left-atrial-appendage-ligation-results-from-the-laala-af-registry
#7
LETTER
Mohit K Turagam, Dhanunjaya Lakkireddy
No abstract text is available yet for this article.
November 10, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29124820/anatomical-and-electrical-remodeling-with-incomplete-left-atrial-appendage-ligation-results-from-the-laala-af-registry
#8
LETTER
Ali Alsagheir, Emilie P Belley-Côté, Richard P Whitlock
No abstract text is available yet for this article.
November 10, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29120076/sequencing-of-uncertain-significance
#9
EDITORIAL
J Kevin Donahue
No abstract text is available yet for this article.
November 9, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29116663/higher-contact-force-energy-setting-and-impedance-rise-during-radiofrequency-ablation-predicts-charring-new-insights-from-contact-force-guided-in-vivo-ablation
#10
Hisaki Makimoto, Andreas Metzner, Roland Richard Tilz, Tina Lin, Christian-H Heeger, Andreas Rillig, Shibu Mathew, Christine Lemeš, Erik Wissner, Karl-Heinz Kuck, Feifan Ouyang
INTRODUCTION: Higher contact force (CF) theoretically increases the risk of blood charring, diminishing lesion formation. We aimed to investigate the relationship between CF, impedance change and char formation during pulmonary vein isolation (PVI). METHODS: CF was assessed during PVI in 65 patients. Radiofrequency ablation (RFA) with power-controlled mode was applied in the point-by-point manner. The RFA were divided into 5 groups: group-A [CF < 10 g], group-B (10 g≤CF < 20 g), group-C (20 g≤CF < 30 g), group-D (30 g≤CF < 40 g), and group-E (CF≥40 g)...
November 8, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29091329/repolarization-abnormalities-unmasked-with-exercise-in-sudden-cardiac-death-survivors-with-structurally-normal-hearts
#11
Kevin Mw Leong, Fu Siong Ng, Caroline Roney, Christopher Cantwell, Matthew J Shun-Shin, Nicholas Wf Linton, Zachary I Whinnett, David C Lefroy, D Wyn Davies, Sian E Harding, Phang Boon Lim, Darrel Francis, Nicholas S Peters, Amanda M Varnava, Prapa Kanagaratnam
BACKGROUND: Models of cardiac arrhythmogenesis predict that non-uniformity in repolarization and/or depolarization promotes ventricular fibrillation and is modulated by autonomic tone, but this is difficult to evaluate in patients. We hypothesize that such spatial heterogeneities would be detected by non-invasive ECG imaging (ECGi) in sudden cardiac death (SCD) survivors with structurally normal hearts under physiological stress. METHODS: ECGi was applied to 11 SCD survivors, 10 low-risk Brugada Syndrome patients (BrS) and 10 controls undergoing exercise treadmill testing...
November 1, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29090495/insights-of-the-superior-vena-cava-conduction-properties-a-3-d-high-resolution-mapping-case-of-typical-flutter
#12
Jesús Jiménez-López, Ermengol Vallès, Begoña Benito, Julio Martí-Almor
No abstract text is available yet for this article.
November 1, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29072796/atrial-tachycardias-cause-or-effect-with-ablation-of-persistent-atrial-fibrillation
#13
Seigo Yamashita, Darren A Hooks, Ashok Shah, Jatin Relan, Ghassen Cheniti, Takeshi Kitamura, Benjamin Berte, Saagar Mahida, Jean-Marc Sellal, Nora Al Jefairi, Antonio Frontera, Sana Amraoui, Arnaud Denis, Nicolas Derval, Frédéric Sacher, Hubert Cochet, Rémi Dubois, Mélèze Hocini, Michel Haïssaguerre, George Klein, Pierre Jaïs
INTRODUCTION: It is largely believed that atrial tachycardias (ATs) encountered during ablation of persistent atrial fibrillation (PsAF) are a byproduct of ablative lesions. We aimed to explore the alternative hypothesis that they may be priori drivers of AF remaining masked until other AF sources are reduced or eliminated. METHODS AND RESULTS: Radiofrequency ablation of fibrillatory drivers mapped by electrocardiographic imaging (ECGI; ECVUEۛ, Cardioinsight Technologies, US) terminated PsAF in 198(73%) out of 270 patients (61±10y, 9±9 m)...
October 26, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29071765/ablation-of-paroxysmal-atrial-fibrillation-using-a-2-nd-generation-cryoballoon-catheter-or-contact-force-sensing-radiofrequency-ablation-catheter-a-comparison-of-costs-and-long-term-clinical-outcomes
#14
Miki Yokokawa, Aman Chugh, Rakesh Latchamsetty, Hamid Ghanbari, Thomas Crawford, Krit Jongnarangsin, Ryan Cunnane, Mohammed Saeed, Kyle Hornsby, Kavita Krishnasamy, Watchara Lohawijarn, Robert Keast, David Karpenko, Frank Bogun, Frank Pelosi, Fred Morady, Hakan Oral
INTRODUCTION: Although noninferiority of cryoballoon ablation (CBA) and radiofrequency catheter ablation for antral pulmonary vein isolation (APVI) has been reported in patients with paroxysmal atrial fibrillation (PAF), it is not clear whether contact force sensing (CF-RFA) and CBA with the 2(nd) generation catheter have similar procedural costs and long-term outcomes. The objective of this study is to compare the long-term efficacy and cost implications of CBA and CF-RFA in patients with PAF...
October 26, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29071756/novel-electrophysiological-criteria-for-septal-ventricular-outflow-tract-tachycardias-requiring-a-sequential-bilateral-ablation
#15
Chin-Yu Lin, Fa-Po Chung, Yenn-Jiang Lin, Shih-Lin Chang, Li-Wei Lo, Yu-Feng Hu, Jo-Nan Liao, Ta-Chuan Tuan, Tze-Fan Chao, Yao-Ting Chang, Yun-Yu Chen, Abigail Louise D Te, Shinya Yamada, Ling Kuo, Jennifer Jeanne B Vicera, Ting-Yung Chang, Hoang Quang Minh, Simon Salim, Ting-Chung Huang, Shih-Ann Chen
BACKGROUND: Septal ventricular outflow tract ventricular arrhythmias (OT-VAs) are defined as septal origin VAs from the right ventricular or left ventricular OT. Patients with septal OT-VAs may require a sequential bilateral OT ablation. This study aimed to evaluate the electrophysiological characteristics and ablation outcome in patients with septal OT-VAs. METHODS: We retrospectively analyzed the electrocardiography and electrophysiological parameters in 96 patients (mean age 49 ± 15 years, 49 male) undergoing bilateral activation mapping before catheter ablation of idiopathic septal OT-VAs...
October 26, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29064614/accuracy-of-the-pacemaker-event-recorder-versus-holter-ecg-to-detect-both-symptomatic-and-asymptomatic-ventricular-arrhythmias
#16
Stela Maria Vitorino Sampaio, Neyle Moara Craveiro, Francisco Darrieux, Ítalo Martins de Oliveira, Mauricio Scanavacca, Denise Hachul
Although new pacemakers can register cardiac rhythm, few studies were performed evaluating their accuracy in diagnosing ventricular arrhythmias (VA). This study aimed to assess the correlation and agreement between the pacemaker's monitor and the ambulatory Holter in detecting VA. METHODS/RESULTS: We studied 129 patients with pacemakers, mean age 68.6±19.1 years, 54.8% female. Once Holter monitoring was connected, the pacemakers' event counters were reset and clocks of both systems were synchronized to register ECG simultaneously...
October 24, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29064134/reducing-radiation-exposure-during-procedures-performed-in-the-electrophysiology-laboratory
#17
Bernard Thibault, Laurent Macle, Blandine Mondésert, Marc Dubuc, Azadeh Shohoudi, Katia Dyrda, Peter G Guerra, Léna Rivard, Denis Roy, Mario Talajic, Paul Khairy
INTRODUCTION: Expert societies recently published strong recommendations to reduce the exposure of patients and staff to ionizing radiation (IR) during interventional and electrophysiology (EP) procedures. However, adherence to these guidelines remains difficult and the impact of implementing such recommendations is poorly characterized. METHODS AND RESULTS: We conducted a single-center cohort study to quantify radiation exposure over time in three EP laboratories at the Montreal Heart Institute during 5,546 consecutive procedures from 2012 to 2015 by 11 primary operators...
October 24, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29064127/second-generation-cryoballoon-ablation-for-treatment-of-persistent-atrial-fibrillation-three-year-outcome-and-predictors-of-recurrence-after-a-single-procedure
#18
Ersan Akkaya, Alexander Berkowitsch, Sergej Zaltsberg, Harald Greiss, Christian W Hamm, Johannes Sperzel, Thomas Neumann, Malte Kuniss
INTRODUCTION: Data on long-term outcomes of cryoballoon (CB) ablation for treatment of persistent atrial fibrillation (AF) are sparse. Here, we report the first 3-year follow-up results and predictors of success for catheter ablation using the second-generation CB in patients with persistent AF. METHODS AND RESULTS: For this prospective observational study, we enrolled 101 patients ablated with the second-generation CB at our institution. The endpoint was the first documented recurrence (> 30 sec) of AF, atrial flutter, or atrial tachycardia after a 3-month blanking period...
October 24, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29059485/clinical-assessment-and-comparison-of-annotation-algorithms-in-high-density-mapping-of-regular-atrial-tachycardias
#19
Jan De Pooter, Milad El Haddad, Michael Wolf, Thomas Phlips, Frederic van Heuverswyn, Liesbeth Timmers, René Tavernier, Sebastien Knecht, Yves Vandekerckhove, Mattias Duytschaever
BACKGROUND: High-density automated mapping of regular atrial tachycardias (AT) requires accurate assessment of local activation times (LAT). OBJECTIVE: To evaluate high density mapping of ATs and compare the accuracy of different automated LAT annotation algorithms. METHODS: Fifteen patients underwent AT ablation guided by the automated ConfiDENSEۛ high-density mapping module (Carto 3 v4) allowing manual reannotation (edited maps). For each AT, unedited automated maps were re-constructed offline by three algorithms: maximum unipolar slope (LATSlope ), bipolar peak (LATPeak ) and a new hybrid annotation algorithm (LATHybrid )...
October 23, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29059484/imaging-characteristics-of-papillary-muscle-site-of-origin-of-ventricular-arrhythmias-in-patients-with-mitral-valve-prolapse
#20
Brian L Fulton, Jackson J Liang, Andres Enriquez, Fermin C Garcia, Gregory E Supple, Michael P Riley, Robert D Schaller, Sanjay Dixit, David J Callans, Francis E Marchlinski, Yuchi Han
BACKGROUND: Mitral valve prolapse has been associated with increased risk of ventricular arrhythmias. We aimed to examine whether certain cardiac imaging characteristics are associated with papillary muscle origin of ventricular arrhythmias in these patients. METHODS AND RESULTS: We screened electronic medical records of all patients documented to have mitral valve prolapse on either transthoracic echocardiogram (TTE) or cardiac magnetic resonance imaging (CMR) in our center, who also underwent an electrophysiologic study (EPS) between 2007 and 2016...
October 23, 2017: Journal of Cardiovascular Electrophysiology
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