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Electroanatomic mapping

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https://www.readbyqxmd.com/read/29155027/serum-level-of-transforming-growth-factor-beta-1-is-associated-with-left-atrial-voltage-in-patients-with-chronic-atrial-fibrillation
#1
Shilu Zhao, Mingfang Li, Weizhu Ju, Lingyun Gu, Fengxiang Zhang, Hongwu Chen, Kai Gu, Bing Yang, Minglong Chen
BACKGROUND: Atrial tissue fibrosis can cause electrical or structural remodeling in patients with atrial fibrillation. Transforming growth factor beta 1(TGF-β1) signaling acts as a central role in fibroblast activation. In this report, we aimed to investigate the relationship between serum level of TGF-β1 and mean left atrial voltage in patients with chronic atrial fibrillation (CAF). METHODS: A total of 16 consecutive adult patients with CAF who underwent catheter ablation were enrolled...
November 15, 2017: Indian Pacing and Electrophysiology Journal
https://www.readbyqxmd.com/read/29134434/fluoroscopy-free-af-ablation-using-transesophageal-echocardiography-and-electroanatomical-mapping-technology
#2
Benjamin O'Brien, Damian C Balmforth, Ross J Hunter, Richard J Schilling
PURPOSE: Guidelines recommend that radiation exposure during AF catheter ablation procedures should be 'as low as reasonably achievable' (ALARA), particularly since many patients may have multiple procedures. Consequently, avoiding radiation exposure altogether must, if safe to do so, be the ultimate goal. The primary objective was to determine the feasibility and efficacy of fluoroscopy-free AF ablation compared to the fluoroscopy-assisted procedure. METHODS: Patients underwent AF ablation using commercially available technology with no routine pre-procedural imaging...
November 14, 2017: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
https://www.readbyqxmd.com/read/29133379/ventricular-tachycardia-in-the-setting-of-chagasic-cardiomyopathy-use-of-voltage-mapping-to-characterize-endoepicardial-nonischemic-scar-distribution
#3
Richard Soto-Becerra, Victor Bazan, William Bautista, Federico Malavassi, Jhancarlo Altamar, Juan David Ramirez, Arlen Everth, David J Callans, Francis E Marchlinski, Diego Rodríguez, Fermin C García, Luis C Sáenz
BACKGROUND: Chagasic cardiomyopathy (CC) is the most frequent nonischemic substrate causing left ventricular (LV) tachycardia in Latin America. Systematic characterization of the LV epicardial/endocardial scar distribution and density in CC has not been performed. Additionally, the usefulness of unipolar endocardial electroanatomic mapping to identify epicardial scar has not been assessed in this setting. METHODS AND RESULTS: Nineteen patients with CC undergoing detailed epicardial and endocardial LV tachycardia mapping and ablation were included...
November 2017: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/29127709/pulmonary-damage-following-right-ventricular-outflow-tachycardia-ablation-in-a-child-when-electroanatomical-mapping-isn-t-good-enough
#4
Neha Bansal, Daisuke Kobayashi, Peter P Karpawich
A 14-year-old female was referred for severe pulmonary valve insufficiency after undergoing radiofrequency ablation for a right ventricular outflow tract tachycardia that originated in the proximal pulmonary artery at 10 years of age. Clinical records indicated that ablation was guided solely by electrograms and electroanatomical mapping. Due to myocardial tissue extensions, mapping failed to identify the level of the pulmonary valve annulus, which resulted in delivery of energy on the valve proper and into the pulmonary artery...
November 11, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/29106546/clinical-validation-of-automatic-local-activation-time-annotation-during-focal-premature-ventricular-complex-ablation-procedures
#5
Juan Acosta, David Soto-Iglesias, Juan Fernández-Armenta, Manuel Frutos-López, Beatriz Jáuregui, Eduardo Arana-Rueda, Marcos Fernández, Diego Penela, Alejandro Alcaine, Lucas Cano, Alonso Pedrote, Antonio Berruezo
Aims: Current navigation systems incorporate algorithms for automatic identification of local activation time (LAT). However, data about their utility and accuracy in premature ventricular complex (PVC) ablation procedures are scarce. This study analyses the accuracy of an algorithmic method based on automatic annotation of the maximal negative slope of the unipolar electrogram within the window demarcated by the bipolar electrogram compared with conventional manual annotation during PVC ablation procedures...
November 2, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/29089463/increased-serum-lysyl-oxidase-like-2-levels-correlate-with-the-degree-of-left-atrial-fibrosis-in-patients-with-atrial-fibrillation
#6
Yingming Zhao, Kangting Tang, Xu Tianbao, Junhong Wang, Jin Yang, Dianfu Li
Atrial fibrillation (AF) progression is generally accompanied by increased atrial fibrosis and atrial structural remodeling. Lysyl oxidase-like 2 (LOXL2) is known to play an important role in many fibrotic conditions, including cardiac fibrosis. This study aimed to explore the relationship between serum LOXL2 levels and AF. Fifty-four AF patients and 32 control subjects were enrolled in the study. High-density three-dimensional electroanatomic mapping was performed, and mean bipolar voltage was assessed in AF patients...
October 31, 2017: Bioscience Reports
https://www.readbyqxmd.com/read/29062705/transvenous-nonfluoroscopic-pacemaker-implantation-during-pregnancy-guided-by-3-dimensional-electroanatomic-mapping
#7
Jacob Hartz, Bradley C Clark, Seiji Ito, Elizabeth D Sherwin, Charles I Berul
No abstract text is available yet for this article.
October 2017: HeartRhythm Case Reports
https://www.readbyqxmd.com/read/29024212/prevalence-and-predictive-factors-of-left-atrial-tachycardia-occurring-after-second-generation-cryoballoon-ablation-of-atrial-fibrillation
#8
Alexis Hermida, Maciej Kubala, Sarah Traullé, Otilia Buiciuc, Serge Quenum, Jean-Sylvain Hermida
INTRODUCTION: Assess the prevalence and predictors of Left Atrial Tachycardia (LAT) after cryoballoon ablation of pulmonary veins. METHODS AND RESULTS: Patients who underwent catheter ablation of pulmonary veins with a second-generation cryoballoon for symptomatic paroxysmal (151/270, 56%) or persistent (119/270, 44%) atrial fibrillation were entered in a single-centre prospective registry. Patients who experienced post-cryoballoon LAT (pcryo-LAT) were selected on the basis of 12-lead ECG characteristics...
October 11, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29024200/novel-automated-point-collection-software-facilitates-rapid-high-density-electroanatomical-mapping-with-multiple-catheter-types
#9
Leon M Ptaszek, Boyce Moon, Guy Rozen, Srijoy Mahapatra, Moussa Mansour
INTRODUCTION: Manual, point-by-point electroanatomical mapping requires the operator to directly evaluate each point during map construction. Consequently, point collection can be a slow process. An automated 3D mapping system was developed with the goal of improving key mapping metrics, including map completion time and point density. METHODS: Automated 3D mapping software that includes morphology and cycle length discrimination functions for surface and intracardiac electrograms was developed...
October 12, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29021854/left-atrial-remodeling-regional-differences-between-paroxysmal-and-persistent-atrial-fibrillation
#10
Rikitake Kogawa, Yasuo Okumura, Ichiro Watanabe, Koichi Nagashima, Keiko Takahashi, Kazuki Iso, Ryuta Watanabe, Masaru Arai, Sayaka Kurokawa, Kimie Ohkubo, Toshiko Nakai, Atsushi Hirayama, Kazumasa Sonoda, Toshimasa Tosaka
BACKGROUND: The mechanisms underlying self-perpetuation of persistent atrial fibrillation (AF) are not well understood. To gain insight into these mechanisms, we conducted a study comparing left atrial (LA) electroanatomic maps obtained during sinus rhythm between patients with paroxysmal AF (PAF) and patients with persistent AF (PerAF). METHODS: The study included 23 men with PAF (age, 56.3±12.1 years) and 13 men with PerAF (age, 54.3±13.4 years). LA voltage mapping was performed during sinus rhythm...
October 2017: Journal of Arrhythmia
https://www.readbyqxmd.com/read/29016750/electroanatomical-mapping-of-coronary-artery-anatomy-to-guide-epicardial-ventricular-tachycardia-ablation
#11
Gustavo Lima da Silva, Nuno Cortez Dias, Luís Carpinteiro, João de Sousa
No abstract text is available yet for this article.
July 19, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28988444/usefulness-of-epicardial-impedance-evaluation-for-epicardial-mapping-and-determination-of-epicardial-ablation-site-for-ventricular-tachycardia-a-pilot-study
#12
Takeshi Kitamura, Seiji Fukamizu, Satoshi Miyazawa, Iwanari Kawamura, Rintaro Hojo, Yuya Aoyama, Mitsuhiro Nishizaki, Harumizu Sakurada, Masayasu Hiraoka
BACKGROUND: During epicardial mapping, determination of appropriate ablation sites in low voltage areas (LVA) is challenging because of large epicardial areas covered by adipose tissue. OBJECTIVE: To evaluate the impedance difference between epicardial fat and the epicardial LVA using multiple detector computed tomography (MDCT). METHODS: We enrolled patients who underwent ventricular tachycardia (VT) ablation via the epicardial approach after endocardial ablation failure...
October 8, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/28919593/electrocardiographic-algorithms-to-guide-a-management-strategy-of-idiopathic-outflow-tract-ventricular-arrhythmias
#13
Bartosz Ludwik, Karol Deutsch, Mariusz Mazij, Janusz Śledź, Aleksandra Morka, Michał Labus, Michał Chrabąszcz, Bartosz Szafran, Jerzy Śpikowski, Lesław Szydłowski, Sebastian M Stec
INTRODUCTION    The current guidelines of the European Society of Cardiology outlined electrocardiographic (ECG) differentiation of site of origin (SOO) in patients with idiopathic ventricular arrhythmias (IVA).  OBJECTIVES    The aim of this study was to compare three ECG algorithms for differentiating SOO and to determine their diagnostic value for the management of outflow tract IVA. PATIENTS AND METHODS    Patients with IVA with inferior axis who underwent successful radiofrequency catheter ablation (RFCA) using the 3D-electroanatomical system were analyzed...
September 6, 2017: Polish Archives of Internal Medicine
https://www.readbyqxmd.com/read/28901573/validation-of-a-novel-cartoseg%C3%A2-segmentation-module-software-for-contrast-enhanced-computed-tomography-guided-radiofrequency-ablation-in-patients-with-atrial-fibrillation
#14
Hasan Imanli, Shaun Bhatty, Jean Jeudy, Yousra Ghzally, Kiddy Ume, Rama Vunnam, Refael Itah, Mati Amit, John Duell, Vincent See, Stephen Shorofsky, Timm M Dickfeld
INTRODUCTION: Visualization of left atrial (LA) anatomy using image integration modules has been associated with decreased radiation exposure and improved procedural outcome when used for guidance of pulmonary vein isolation (PVI) in atrial fibrillation (AF) ablation. We evaluated the CARTOSEG™ CT Segmentation Module (Biosense Webster, Inc.) that offers a new CT-specific semiautomatic reconstruction of the atrial endocardium. METHODS: The CARTOSEG™ CT Segmentation Module software was assessed prospectively in 80 patients undergoing AF ablation...
September 13, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28895163/off-the-pedal-fluoroless-transseptal-puncture-in-pediatric-supraventricular-tachycardia-ablation
#15
Bradley C Clark, Kohei Sumihara, Charles I Berul, Jeffrey P Moak
BACKGROUND: Fluoroless transseptal (TS) puncture may represent the final step toward elimination of fluoroscopy in pediatric supraventricular tachycardia ablation in normal hearts. We aimed to demonstrate the safety and feasibility of fluoroless TS puncture in pediatric patients and compare procedural timing with the fluoroscopic approach. METHODS: We performed a retrospective cohort analysis of all TS procedures performed without fluoroscopy at our institution; fluoroless TS procedures were performed under intracardiac echocardiography (ICE) guidance after the creation of a 3D electroanatomic map and identification of fossa ovalis (FO) on 3D map...
September 12, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28892174/a-quantitative-comparison-of-the-electrical-and-anatomical-definition-of-the-pulmonary-vein-ostium
#16
Florian Spies, Michael Kühne, Tobias Reichlin, Stefan Osswald, Christian Sticherling, Sven Knecht
BACKGROUND: Anatomically guided pulmonary vein isolation (PVI) is the cornerstone of atrial fibrillation (AF) ablation. However, the position where to confirm electrical isolation is ill-defined. The aim of the current study was to quantify the relationship between the anatomical and electrical definition of the pulmonary vein ostium. METHODS: We analyzed 20 patients with paroxysmal AF undergoing PVI using radiofrequency energy and an electroanatomical mapping system...
September 11, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28884923/low-voltage-areas-detected-by-high-density-electroanatomical-mapping-predict-recurrence-after-ablation-for-paroxysmal-atrial-fibrillation
#17
Konstantinos Vlachos, Michael Efremidis, Konstantinos P Letsas, George Bazoukis, Ruairidh Martin, Maria Kalafateli, Louiza Lioni, Stamatis Georgopoulos, Athanasios Saplaouras, Theodore Efremidis, Tong Liu, Kosmas Valkanas, Nikolaos Karamichalakis, Dimitrios Asvestas, Antonios Sideris
INTRODUCTION: We aimed to evaluate the extent of atrial fibrosis in paroxysmal atrial fibrillation (AF) and the correlation with ablation outcomes after pulmonary vein antral isolation (PVΑI) using a mapping system with high-resolution and high-spatial sampling. METHODS AND RESULTS: We prospectively enrolled 80 consecutive patients (45 males, median age 60.26 years) with symptomatic paroxysmal AF who were scheduled for PVAI. Prior to PVAI, high-density bipolar voltage mapping (median number of 2,485 points) was carried out during sinus rhythm in all patients...
September 8, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/28884216/standardized-unfold-mapping-a-technique-to-permit-left-atrial-regional-data-display-and-analysis
#18
Steven E Williams, Catalina Tobon-Gomez, Maria A Zuluaga, Henry Chubb, Constantine Butakoff, Rashed Karim, Elena Ahmed, Oscar Camara, Kawal S Rhode
PURPOSE: Left atrial arrhythmia substrate assessment can involve multiple imaging and electrical modalities, but visual analysis of data on 3D surfaces is time-consuming and suffers from limited reproducibility. Unfold maps (e.g., the left ventricular bull's eye plot) allow 2D visualization, facilitate multimodal data representation, and provide a common reference space for inter-subject comparison. The aim of this work is to develop a method for automatic representation of multimodal information on a left atrial standardized unfold map (LA-SUM)...
October 2017: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
https://www.readbyqxmd.com/read/28862408/benefits-of-electroanatomic-ablation-of-conventional-cardiac-arrhytmias-from-fluoroscopy-to-zero-x-ray-mapping
#19
Michela Casella, Valentina Ribatti, Valentina Catto, Giulia Vettor, Gaetano Fassini, Viviana Biagioli, Antonio Dello Russo, Claudio Tondo
Electrophysiology procedures are traditionally performed under fluoroscopic guidance. Nowadays a growing interest in the radiation risk associated to these procedures has been cultivated, since radiation exposure has non-neglegible stochastic and deterministic effects on health. A correlation between radiation exposure and lifetime malignancy effect is difficult to establish and the threshold of a completely safe exposure dose is unknown. Thus, electrophisiologists have become aware of the use of fluoroscopy and they have tried to use all the complementary imaging technologies available in order to reduce the radiological exposure...
August 31, 2017: Minerva Cardioangiologica
https://www.readbyqxmd.com/read/28845235/cardiac-electrophysiology-under-mri-guidance-an-emerging-technology
#20
Henry Chubb, Steven E Williams, John Whitaker, James L Harrison, Reza Razavi, Mark O'Neill
MR-guidance of electrophysiological (EP) procedures offers the potential for enhanced arrhythmia substrate assessment, improved procedural guidance and real-time assessment of ablation lesion formation. Accurate device tracking techniques, using both active and passive methods, have been developed to offer an interface similar to electroanatomic mapping platforms, and MR-compatible EP equipment continues to be developed. Progress to clinical implementation of these technically complex fields has been relatively slow over the last 10 years, but recent developments have led to successful clinical experience...
June 2017: Arrhythmia & Electrophysiology Review
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