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Electroanatomic mapping

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https://www.readbyqxmd.com/read/28433558/spatial-relationship-of-organized-rotational-and-focal-sources-in-human-atrial-fibrillation-to-autonomic-ganglionated-plexi
#1
Tina Baykaner, Theodoros A Zografos, Junaid A B Zaman, Ioannis Pantos, Mahmood Alhusseini, Rachita Navara, David E Krummen, Sanjiv M Narayan, Demosthenes G Katritsis
BACKGROUND: One approach to improve ablation for atrial fibrillation (AF) is to focus on physiological targets including focal or rotational sources or ganglionic plexi (GP). However, the spatial relationship between these potential mechanisms has never been studied. We tested the hypothesis that rotors and focal sources for AF may co-localize with ganglionated plexi (GP). METHODS: We prospectively identified locations of AF rotors and focal sources, and correlated these to GP sites in 97 consecutive patients (age 59...
April 19, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28431725/intraoperative-three-dimensional-mapping%C3%A2-of-supraventricular-tachycardia-in-a-young-fontan%C3%A2-patient
#2
James C Perry, Matthew R Williams, Suzanne Shepard, Andras Bratincsak, Cynthia Murphy, Raghav Murthy, Mohammad Ebrahim, John J Lamberti
Preoperative tachycardia is uncommon before an initial Fontan procedure. Catheter intervention can risk complications in small patients. A patient with fetal tachycardia and double inlet left ventricle underwent Norwood and bidirectional Glenn procedures. She had persistent tachycardia. A three-dimensional electroanatomic mapping system was modified for the operative procedure; it was used to identify the arrhythmia substrate and cryoablate an atrioventricular nodal tachycardia. Mapping added 20 minutes to the operation...
May 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28422368/safety-and-efficacy-of-pulmonary-vein-isolation-using-a-surround-flow-catheter-with-contact-force-measurement-capabilities-a-multicenter-registry
#3
Giuseppe Stabile, Paolo Di Donna, Vincenzo Schillaci, Antonio Di Monaco, Assunta Iuliano, Domenico Caponi, Francesco Urraro, Francesco Solimene, Massimo Grimaldi, Marco Scaglione
INTRODUCTION: Pulmonary vein (PV) isolation is the cornerstone of catheter ablation in patients with atrial fibrillation (AF). Surround flow and contact force (CF) measurement capabilities might enhance procedure efficacy and safety. We report on the safety and mid-term efficacy of a novel ablation catheter for PV isolation in patients with AF. METHODS AND RESULTS: Two hundred thirty-three consecutive patients (57±11 years, 76% males, 51% with structural heart disease) referred for paroxysmal (157) or persistent (76) AF, underwent PV isolation by a surround flow catheter with CF measurement capability in 4 centers...
April 19, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/28409519/off-line-analysis-of-electro-anatomical-mapping-in-ventricular-arrhythmias
#4
Daniele Muser, Jackson J Liang, Pasquale Santangeli
Sudden cardiac death due to ventricular tachycardia (VT) is a major health issue in patients with structural heart disease and depressed ejection fraction. If from one side, implantable cardioverter defibrillator (ICD) therapy has significantly improved survival of these patients, on the other hand, it has led to frequent ICD shocks as an emerging problem, being associated with poor quality of life, frequent hospitalizations and increased mortality. Scar-related reentry due to the coexistence of surviving myocardial fibers within fibrotic tissue is the most common mechanism subtending VT both in ischemic and non-ischemic cardiomyopathies...
April 12, 2017: Minerva Cardioangiologica
https://www.readbyqxmd.com/read/28395996/atrial-fibrillation-ablation-guided-by-a-novel-nonfluoroscopic-navigation-system
#5
Gabriel Ballesteros, Pablo Ramos, Renzo Neglia, Diego Menéndez, Ignacio García-Bolao
INTRODUCTION AND OBJECTIVES: Rhythmia is a new nonfluoroscopic navigation system that is able to create high-density electroanatomic maps. The aim of this study was to describe the acute outcomes of atrial fibrillation (AF) ablation guided by this system, to analyze the volume provided by its electroanatomic map, and to describe its ability to locate pulmonary vein (PV) reconnection gaps in redo procedures. METHODS: This observational study included 62 patients who underwent AF ablation with Rhythmia compared with a retrospective cohort who underwent AF ablation with a conventional nonfluoroscopic navigation system (Ensite Velocity)...
April 5, 2017: Revista Española de Cardiología
https://www.readbyqxmd.com/read/28387462/identification-and-electrophysiological-characterization-of-early-left-atrial-structural-remodeling-as-a-predictor-for-atrial-fibrillation-recurrence-after-pulmonary-vein-isolation
#6
Atsuhiko Yagishita, Dina Sparano, Ivan Cakulev, J Rod Gimbel, Timothy Phelan, Hossam Mustafa, Samer De Oliveira, Judith Mackall, Mauricio Arruda
BACKGROUND: Voltage-guided substrate ablation following pulmonary vein isolation (PVI) improves atrial fibrillation (AF) ablation outcomes. However, by setting upper voltage cutoff of 0.5 mV during sinus rhythm (SR) to guided substrate ablation using electroanatomic voltage mapping (EAVM), mildly affected low voltage area (maLVA) may be undetected. We sought to determine the optimal bipolar voltage cutoff to identify maLVA, its electrogram complexity, and the implication on ablation outcome...
April 7, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/28379525/local-activation-time-sampling-density-for-atrial-tachycardia-contact-mapping-how-much-is-enough
#7
Steven E Williams, James L Harrison, Henry Chubb, John Whitaker, Radek Kiedrowicz, Christopher A Rinaldi, Michael Cooklin, Matthew Wright, Steven Niederer, Mark D O'Neill
Aims: Local activation time (LAT) mapping forms the cornerstone of atrial tachycardia diagnosis. Although anatomic and positional accuracy of electroanatomic mapping (EAM) systems have been validated, the effect of electrode sampling density on LAT map reconstruction is not known. Here, we study the effect of chamber geometry and activation complexity on optimal LAT sampling density using a combined in silico and in vivo approach. Methods and results: In vivo 21 atrial tachycardia maps were studied in three groups: (1) focal activation, (2) macro-re-entry, and (3) localized re-entry...
April 3, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28371837/characterization-of-the-arrhythmogenic-substrate-in-patients-with-arrhythmogenic-right-ventricular-cardiomyopathy-undergoing-ventricular-tachycardia-ablation
#8
Senthil Kirubakaran, Caterina Bisceglia, John Silberbauer, Teresa Oloriz, Giulia Santagostino, Miki Yamase, Giuseppe Maccabelli, Nicola Trevisi, Paolo Della Bella
Aims: Arrhythmogenic right ventricular (RV) cardiomyopathy (ARVC) is associated with ventricular arrhythmias, even without RV structural disease. We aimed to characterize the RV substrate using electroanatomical mapping and to define outcomes following ventricular tachycardia (VT) ablation in patients with and without RV structural abnormalities. Methods and results: Twenty-nine patients with definite or suspected ARVC undergoing VT ablation were classified as 'electrical' and 'structural' cardiomyopathy based on the absence or presence of major structural criteria...
March 20, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28347634/ten-year-outcomes-of-monomorphic-ventricular-tachycardia-catheter-ablation-in-repaired-tetralogy-of-fallot
#9
Mikaël Laredo, Robert Frank, Xavier Waintraub, Estelle Gandjbakhch, Laurence Iserin, Sebastien Hascoët, Caroline Himbert, Yves Gallais, Françoise Hidden-Lucet, Guillaume Duthoit
BACKGROUND: Monomorphic ventricular tachycardia (MVT) is common in adults with repaired tetralogy of Fallot (TOF), and is associated with sudden cardiac death. Management of MVT is not defined, and results of catheter ablation (CA) are limited. AIMS: To evaluate long-term outcomes of MVT CA in repaired TOF. METHODS: Thirty-four patients (mean age 32±10.3 years; 59% male) with repaired TOF underwent CA for symptomatic MVT between 1990 and 2012 in our centre; direct-current ablation (DCA) was used in 6%, radiofrequency followed by DCA in 29% and radiofrequency alone in 65%...
March 24, 2017: Archives of Cardiovascular Diseases
https://www.readbyqxmd.com/read/28340110/peri-mitral-atrial-flutter-personalized-ablation-strategy-based-on-arrhythmogenic-substrate
#10
Jinbo Yu, Kai Chen, Bing Yang, Fengxiang Zhang, Weizhu Ju, Hongwu Chen, Gang Yang, Mingfang Li, Benqi Wang, Kai Gu, Feifan Ouyang, Siew Yen Ho, Sunny Po, Minglong Chen
Aims: The aim of this study is to characterize the arrhythmogenic substrate for peri-mitral atrial flutter (PMAFL), thereby determining a personalized ablation strategy to treat PMAFL. Methods and results: Thirty-six consecutive PMAFL patients (mean age: 63.8 ± 11.3, 23 males) underwent detailed three-dimensional electroanatomic mapping in left atrium (LA). The LA was divided into septal-anterior wall (SAW), posterior inferior wall (PIW), and mitral isthmus (MI) region, respectively...
March 1, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28340078/image-integration-into-3-dimensional-electro-anatomical-mapping-system-facilitates-safe-ablation-of-ventricular-arrhythmias-originating-from-the-aortic-root-and-its-vicinity
#11
Mario Jularic, Ruken Özge Akbulak, Benjamin Schäffer, Julia Moser, Jana Nuehrich, Christian Meyer, Christian Eickholt, Stephan Willems, Boris A Hoffmann
Aims: During ablation in the vicinity of the coronary arteries establishing a safe distance from the catheter tip to the relevant vessels is mandatory and usually assessed by fluoroscopy alone. The aim of the study was to investigate the feasibility of an image integration module (IIM) for continuous monitoring of the distance of the ablation catheter tip to the main coronary arteries during ablation of ventricular arrhythmias (VA) originating in the sinus of valsalva (SOV) and the left ventricular summit part of which can be reached via the great cardiac vein (GCV)...
March 7, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28322592/intravascular-pulmonary-venous-ultrasound-imaging-for-catheter-ablation-of-atrial-fibrillation
#12
Gabriel Cismaru, Serban Schiau, Lucian Muresan, Radu Rosu, Mihai Puiu, Gabriel Gusetu, Dana Pop, Dumitru Zdrenghea
Atrial fibrillation is the most common cardiac arrhythmia. The development of electroanatomical mapping is an increase demand for advanced intracardiac imaging techniques of the left atrium and pulmonary veins. IVUS can demonstrate quantitative changes like lumen and wall thickness as well as qualitative changes of the pulmonary wall. IVUS could also provide relevant real time imaging of the atrial and pulmonary venous wall during catheter ablation. Areas covered: The Medline and Embase databases were searched for preclinical and clinical studies of IVUS in patients with ablation of atrial fibrillation or left atrial arrhythmias...
April 2017: Expert Review of Medical Devices
https://www.readbyqxmd.com/read/28296283/effects-of-transendocardial-cd34-cell-transplantation-on-diastolic-parameters-in-patients-with-nonischemic-dilated-cardiomyopathy
#13
Mojca Bervar, Mirta Kozelj, Gregor Poglajen, Matjaz Sever, Gregor Zemljic, Sabina Frljak, Marko Cukjati, Peter Cernelc, François Haddad, Bojan Vrtovec
We sought to evaluate the physiological background and the effects of CD34(+) cell transplantation on diastolic parameters in nonischemic dilated cardiomyopathy patients (DCM). We enrolled 38 DCM patients with NYHA class III and LVEF <40% who underwent transendocardial CD34(+) cell transplantation. Peripheral blood CD34(+) cells were mobilized by G-CSF, collected via apheresis, and injected transendocardially in the areas of myocardial hibernation. Patients were followed for 1 year. At baseline, estimated filling pressures were significantly elevated (E/e'≥15) in 18 patients (Group A), and moderately elevated (E/e'<15) in 20 patients (Group B)...
March 11, 2017: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/28296026/bioprosthetic-mitral-valve-paravalvular-leak-closure-using-intracardiac-echocardiography-guided-three-dimensional-electroanatomic-mapping
#14
Subhi J Al'Aref, Richard B Devereux, Jim W Cheung, Geoffrey Bergman
The development of paravalvular leak (PVL) following surgical replacement of an aortic or mitral valve is an uncommon complication with significant morbidity and mortality. Surgical or percutaneous repair of PVL can be technically challenging. We describe the application of intracardiac echocardiography guided 3-dimensional electroanatomic mapping to facilitate PVL closure in a symptomatic patient with a previously placed bioprosthetic mitral valve. © 2017 Wiley Periodicals, Inc.
March 15, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28279745/novel-algorithm-for-accelerated-electroanatomic-mapping-and-prediction-of-earliest-activation-of-focal-cardiac-arrhythmias-using-mathematical-optimization
#15
Tobias Weber, Hugo A Katus, Sebastian Sager, Eberhard P Scholz
BACKGROUND: Premature beats (PBs) are a common finding in patients suffering from structural heart disease, but they can also be present in healthy individuals. Catheter ablation represents a suitable therapeutic approach. However, the exact localization of the origin can be challenging, especially in cases of low PB burden during the procedure. OBJECTIVE: The aim of this study was to develop an automated mapping algorithm on the basis of the hypothesis that mathematical optimization would significantly accelerate the localization of earliest activation...
March 6, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/28275856/-window-sliding-analysis-combined-with-high-density-and-rapid-electroanatomical-mapping-its-efficacy-and-the-outcome-of-catheter-ablation-of-atrial-tachycardia
#16
Kosuke Nakasuka, Koji Miyamoto, Takashi Noda, Tsukasa Kamakura, Mitsuru Wada, Ikutaro Nakajima, Kohei Ishibashi, Yuko Inoue, Hideo Okamura, Satoshi Nagase, Takeshi Aiba, Shiro Kamakura, Wataru Shimizu, Teruo Noguchi, Toshihisa Anzai, Satoshi Yasuda, Nobuyuki Ohte, Kengo Kusano
Atrial tachycardia (AT) is a clinically challenging arrhythmia that can occur based on atrial substrates. Nowadays, a rapid construction of three-dimensional electroanatomical maps, which has an analysis function for complex arrhythmias, named 'Window Sliding' (WS) is available. However, little data has revealed the efficacy of this mapping strategy. The aim of this study was to investigate the efficacy of the WS analysis for AT treatments. All patients underwent electrophysiological studies during ATs and the characteristics of the ATs were analyzed using rapid high-density mapping followed by the WS analysis...
March 8, 2017: Heart and Vessels
https://www.readbyqxmd.com/read/28236155/cardiac-magnetic-resonance-imaging-and-electroanatomic-voltage-discordance-in-non-ischemic-left-ventricle-ventricular-tachycardia-and-premature-ventricular-depolarizations
#17
Brian P Betensky, Wei Dong, Benjamin A D'Souza, Erica S Zado, Yuchi Han, Francis E Marchlinski
PURPOSE: Magnetic resonance imaging (MRI) with late gadolinium enhancement is commonly performed in patients with non-ischemic LV ventricular tachycardia/ventricular premature depolarizations (non-ischemic LV-VT/VPDs) to define VT substrate prior to catheter ablation. We investigated the prevalence of abnormal voltage and VT localized to areas of the myocardium not reported to have late gadolinium enhancement (LGE) on routine pre-procedural MRI and sought to determine if quantitative MRI analysis could reduce this discordance...
February 24, 2017: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
https://www.readbyqxmd.com/read/28197345/ventricular-tachycardia-originating-from-moderator-band-new-perspective-on-catheter-ablation
#18
Jin-Yi Li, Jing-Bo Jiang, Yan He, Jian-Chun Luo, Guo-Qiang Zhong
A 59-year-old woman was referred to the institution with burdens of idiopathic ventricular tachycardia (IVT). Electroanatomic mapping revealed a complex fractionated, high frequency potential with long duration preceding the QRS onset of the IVT. The real end point of ablation was the disappearance of the conduction block of Purkinje potential during the sinus rhythm besides the disappearance of the inducible tachycardia. Location of distal catheter was at the moderator band (MB) by transthoracic echocardiography (TTE)...
2017: Case Reports in Cardiology
https://www.readbyqxmd.com/read/28182233/arrhythmogenic-anatomical-isthmuses-identified-by-electroanatomical-mapping-are-the-substrate-for-ventricular-tachycardia-in-repaired-tetralogy-of-fallot
#19
Gijsbert F L Kapel, Frédéric Sacher, Olaf M Dekkers, Masaya Watanabe, Nico A Blom, Jean-Benoît Thambo, Nicolas Derval, Martin J Schalij, Zakaria Jalal, Adrianus P Wijnmaalen, Katja Zeppenfeld
No abstract text is available yet for this article.
January 21, 2017: European Heart Journal
https://www.readbyqxmd.com/read/28167090/ablation-of-ventricular-tachycardia-in-arrhythmogenic-right-ventricular-dysplasia
#20
REVIEW
Rajeev K Pathak, Fermin C Garcia
Endocardial and epicardial electroanatomical mapping and ablation is a safe and effective therapy in the treatment of right ventricle arrhythmias occurring in the setting of arrhythmogenic right ventricular cardiomyopathy (ARVD). Careful mapping and ablation plans must be tailored for each patient based on comorbidities and ventricular tachycardia morphologies. This review focuses on the catheter ablation for ventricular arrhythmias in patients with ARVD.
March 2017: Cardiac Electrophysiology Clinics
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