keyword
MENU ▼
Read by QxMD icon Read
search

Cardiac electroanatomic mapping

keyword
https://www.readbyqxmd.com/read/29759782/regional-left-ventricular-electrical-activation-and-peak-contraction-are-closely-related-in-candidates-for-cardiac-resynchronization-therapy
#1
Masih Mafi-Rad, Jetske Van't Sant, Yuri Blaauw, Pieter A Doevendans, Maarten J Cramer, Harry J Crijns, Frits W Prinzen, Mathias Meine, Kevin Vernooy
OBJECTIVES: This study determined the relationship between the timing of left ventricular (LV) electrical activation and peak contraction at potential LV pacing locations in candidates for cardiac resynchronization therapy (CRT). BACKGROUND: Targeting the LV lead to the region of latest electrical activation or the segment of latest peak contraction has both been shown to improve CRT response. Whether these regions correspond within CRT patients is uncertain. METHODS: Twenty-eight consecutive CRT candidates underwent intraprocedural coronary venous electroanatomic mapping using EnSite NavX...
August 2017: JACC. Clinical Electrophysiology
https://www.readbyqxmd.com/read/29716710/catheter-ablation-for-electrical-storm-in-brugada-syndrome-results-of-substrate-based-ablation
#2
Abhijeet Shelke, Ajit Tachil, Daljeet Saggu, Masilamani Lawrance Jesuraj, Sachin Yalagudri, Calambur Narasimhan
BACKGROUND: Brugada syndrome (BrS) is known to cause malignant ventricular arrhythmia (VA) and sudden cardiac death (SCD). Patients with implantable cardioverter defibrillator (ICD) may experience recurrent shocks from ICD. Recent reports indicate that radiofrequency ablation (RFA) in BrS is feasible, and effective. Catheter ablation of premature ventricular complexes (PVCs) triggering VA and substrate modification of right ventricular outflow tract (RVOT) has been described. METHODS AND RESULTS: Five patients (4 males, age-23 to 32 years) with BrS and electrical storm (ES) despite being on isoprenaline infusion and cilostazol (phosphodiestrase-3 inhibitor) underwent 3 dimensional electroanatomic mapping and RFA...
March 2018: Indian Heart Journal
https://www.readbyqxmd.com/read/29663562/atrial-fibrillation-ablation-using-cryoballoon-technology-recent-advances-and-practical-techniques
#3
REVIEW
Shaojie Chen, Boris Schmidt, Stefano Bordignon, Fabrizio Bologna, Laura Perrotta, Takahiko Nagase, K R Julian Chun
Atrial fibrillation (AF) affects 1-2% of the population, and its prevalence is estimated to double in the next 50 years as the population ages. AF results in impaired patients' life quality, deteriorated cardiac function and even increased mortality. Antiarrhythmic drugs frequently fail to restore sinus rhythm. Catheter ablation is a valuable treatment approach for AF, even as a first-line therapy strategy in selected patients. Effective electrical pulmonary vein isolation (PVI) is the cornerstone of all AF ablation strategies...
April 16, 2018: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29584897/magnetic-resonance-imaging-guidance-for-the-optimization-of-ventricular-tachycardia-ablation
#4
Rahul K Mukherjee, John Whitaker, Steven E Williams, Reza Razavi, Mark D O'Neill
Catheter ablation has an important role in the management of patients with ventricular tachycardia (VT) but is limited by modest long-term success rates. Magnetic resonance imaging (MRI) can provide valuable anatomic and functional information as well as potentially improve identification of target sites for ablation. A major limitation of current MRI protocols is the spatial resolution required to identify the areas of tissue responsible for VT but recent developments have led to new strategies which may improve substrate assessment...
March 23, 2018: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/29572086/influence-of-contact-force-on-voltage-mapping-a-combined-magnetic-resonance-imaging-and-electroanatomic-mapping-study-in-patients-with-tetralogy-of-fallot
#5
Elvis Teijeira-Fernandez, Hubert Cochet, Felix Bourier, Masateru Takigawa, Ghassen Cheniti, Nathaniel Thompson, Antonio Frontera, Claudia Camaioni, Gregoire Massouille, Zakaria Jalal, Nicolas Derval, Xavier Iriart, Arnaud Denis, Meleze Hocini, Michel Haissaguerre, Pierre Jais, Jean-Benoit Thambo, Frederic Sacher
BACKGROUND: Voltage criteria for ventricular mapping have been obtained from small series of patients and prioritizing high specificity. OBJECTIVE: Using tetralogy of Fallot as a model of transmural right ventricular (RV) scar and MRI as reference, we aimed to study the potential influence of contact force (CF) on voltage mapping and to define voltage cutoff values for RV scar. METHODS: Fourteen patients (age 32.6±14.3, 5 female) with repaired tetralogy of Fallot underwent high resolution cardiac MRI (1...
March 20, 2018: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/29388068/characterizing-left-ventricular-mechanical-and-electrical-activation-in-patients-with-normal-and-impaired-systolic-function-using-a-non-fluoroscopic-cardiovascular-navigation-system
#6
Christopher Piorkowski, Arash Arya, Craig D Markovitz, Hedi Razavi, Chunlan Jiang, Stuart Rosenberg, Ole-A Breithardt, Sascha Rolf, Silke John, Jedrzej Kosiuk, Yan Huo, Michael Döring, Sergio Richter, Kyungmoo Ryu, Thomas Gaspar, Frits W Prinzen, Gerhard Hindricks, Philipp Sommer
PURPOSE: Cardiac disease frequently has a degenerative effect on cardiac pump function and regional myocardial contraction. Therefore, an accurate assessment of regional wall motion is a measure of the extent and severity of the disease. We sought to further validate an intra-operative, sensor-based technology for measuring wall motion and strain by characterizing left ventricular (LV) mechanical and electrical activation patterns in patients with normal (NSF) and impaired systolic function (ISF)...
April 2018: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
https://www.readbyqxmd.com/read/29380921/correlation-between-computer-tomography-derived-scar-topography-and-critical-ablation-sites-in-postinfarction-ventricular-tachycardia
#7
Michael Ghannam, Hubert Cochet, Pierre Jais, Maxime Sermesant, Smita Patel, Konstantinos C Siontis, Fred Morady, Frank Bogun
BACKGROUND: Myocardial wall thickness (WT) in patients with a prior myocardial infarction has been used to indicate scarring. However, the correlation of WT with sites critical to ventricular tachycardia (VT) has not been previously investigated. The purpose of this study was to correlate electroanatomic mapping data obtained during VT ablation with WT determined by cardiac computed tomography (CT). METHODS AND RESULTS: Cardiac CTs were performed in 15 consecutive patients (mean age 63 ± 10 years, 86% male, left ventricular ejection fraction 27 ± 12%) with a prior infarct referred for VT ablation...
March 2018: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29197656/endocardial-infarct-scar-recognition-by-myocardial-electrical-impedance-is-not-influenced-by-changes-in-cardiac-activation-sequence
#8
Gerard Amorós-Figueras, Esther Jorge, Concepción Alonso-Martin, Daniel Traver, Maria Ballesta, Ramon Bragós, Javier Rosell-Ferrer, Juan Cinca
BACKGROUND: Measurement of myocardial electrical impedance can allow recognition of infarct scar and is theoretically not influenced by changes in cardiac activation sequence, but this is not known. OBJECTIVES: The objectives of this study were to evaluate the ability of endocardial electrical impedance measurements to recognize areas of infarct scar and to assess the stability of the impedance data under changes in cardiac activation sequence. METHODS: One-month-old myocardial infarction confirmed by cardiac magnetic resonance imaging was induced in 5 pigs submitted to coronary artery catheter balloon occlusion...
December 27, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
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
#9
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/29089463/increased-serum-lysyl-oxidase-like-2-levels-correlate-with-the-degree-of-left-atrial-fibrosis-in-patients-with-atrial-fibrillation
#10
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. The present 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...
December 22, 2017: Bioscience Reports
https://www.readbyqxmd.com/read/29024200/novel-automated-point-collection-software-facilitates-rapid-high-density-electroanatomical-mapping-with-multiple-catheter-types
#11
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...
January 2018: Journal of Cardiovascular Electrophysiology
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
#12
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/28884216/standardized-unfold-mapping-a-technique-to-permit-left-atrial-regional-data-display-and-analysis
#13
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
#14
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-negligible 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...
February 2018: Minerva Cardioangiologica
https://www.readbyqxmd.com/read/28845235/cardiac-electrophysiology-under-mri-guidance-an-emerging-technology
#15
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
https://www.readbyqxmd.com/read/28680604/atrial-flutter-in-a-patient-with-atrial-septal-defect-and-anomalous-venous-drainage-unusual-approach-for-ablation
#16
Ivo Roca-Luque, Nuria Rivas, Laura Dos, Jaume Francisco, Jordi Pérez-Rodon, Antònia Pijuan, David Garcia-Dorado, Àngel Moya
Atrial flutter ablation in CHD (Congenital Heart Disease) patients is a challenging procedure because of the possibility of multiple circuits. Electroanatomical mapping and pacing maneuvers are crucial to determine critical isthmus. Moreover, vascular abnormalities and residual cardiac defects need to be known before the ablation to decide the better strategy for ablation.
July 2017: Clinical Case Reports
https://www.readbyqxmd.com/read/28678556/electroanatomical-mapping-systems-and-intracardiac-echo-integration-for-guided-endomyocardial-biopsy
#17
REVIEW
Michela Casella, Antonio Dello Russo, Giulia Vettor, Giuseppe Lumia, Valentina Catto, Elena Sommariva, Valentina Ribatti, Viviana Biagioli, Fabrizio Tundo, Corrado Carbucicchio, Luigi Di Biase, Andrea Natale, Claudio Tondo
During the past years, endomyocardial biopsy (EMB) has gradually spread into clinical practice. However, the role of EMB in the diagnosis and treatment of cardiovascular diseases remains a controversial issue, especially in the setting of unexplained ventricular arrhythmias. Areas covered: This review describes the methodology of EMB guided by combined use of three-dimensional electroanatomical mapping systems and intracardiac echo and summarizes the classical, fluoroscopy-guided EMB technique. Finally, the personal experience acquired with the 'electrophysiologist-made' integration methodology has been reported...
August 2017: Expert Review of Medical Devices
https://www.readbyqxmd.com/read/28677509/therapy-of-cardiac-arrhythmias-in-children-an-emerging-role-of-electroanatomical-mapping-systems
#18
Matteo Casale, Maurizio Mezzetti, Viviana Tulino, Scarano Michele, Paolo Busacca, Giuseppe Dattilo
INTRODUCTION: Cardiac arrhythmias are challenging diseases in childhood. Most of them in pediatric subjects (90.2%) are atrioventricular reentrant tachycardias and atrioventricular nodal reentrant tachycardias. The standard 12-lead ECG is a highly accurate diagnostic tool but an invasive electrophysiological study is often required. The main concern about this kind of procedures is their invasive nature and the need of radiations, so antiarrhythmic agents are currently the first line therapy...
July 5, 2017: Current Vascular Pharmacology
https://www.readbyqxmd.com/read/28641242/arrhythmia-mechanism-and-scaling-effect-on-the-spectral-properties-of-electroanatomical-maps-with-manifold-harmonics
#19
Margarita Sanroman-Junquera, Inmaculada Mora-Jimenez, Arcadi Garcia-Alberola, Antonio J Caamano, Beatriz Trenor, Jose Luis Rojo-Alvarez
Spatial and temporal processing of intracardiac electrograms provides relevant information to support the arrhythmia ablation during electrophysiological studies. Current Cardiac Navigation Systems (CNS) and Electrocardiographic Imaging (ECGI) build detailed three-dimensional electroanatomical maps (EAM), which represent the spatial anatomical distribution of bioelectrical features, such as activation time or voltage. We present a principled methodology for spectral analysis of both EAM geometry and bioelectrical feature in CNS or ECGI, including their spectral representation, cut-off frequency, or spatial sampling rate (SSR)...
June 15, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28630171/distinctive-left-ventricular-activations-associated-with-ecg-pattern-in-heart-failure-patients
#20
COMPARATIVE STUDY
Nicolas Derval, Josselin Duchateau, Saagar Mahida, Romain Eschalier, Frederic Sacher, Joost Lumens, Hubert Cochet, Arnaud Denis, Xavier Pillois, Seigo Yamashita, Yuki Komatsu, Sylvain Ploux, Sana Amraoui, Adlane Zemmoura, Philippe Ritter, Mélèze Hocini, Michel Haissaguerre, Pierre Jaïs, Pierre Bordachar
BACKGROUND: In contrast to patients with left bundle branch block (LBBB), heart failure patients with narrow QRS and nonspecific intraventricular conduction delay (NICD) display a relatively limited response to cardiac resynchronization therapy. We sought to compare left ventricular (LV) activation patterns in heart failure patients with narrow QRS and NICD to patients with LBBB using high-density electroanatomic activation maps. METHODS AND RESULTS: Fifty-two heart failure patients (narrow QRS [n=18], LBBB [n=11], NICD [n=23]) underwent 3-dimensional electroanatomic mapping with a high density of mapping points (387±349 LV)...
June 2017: Circulation. Arrhythmia and Electrophysiology
keyword
keyword
69071
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"