Read by QxMD icon Read

Cardiac electroanatomic mapping

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)...
January 31, 2018: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
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...
January 30, 2018: Journal of Cardiovascular Electrophysiology
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
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
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
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
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
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
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
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
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
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...
July 11, 2017: Expert Review of Medical Devices
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
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
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
Hiroshi Kawakami, Ikutaro Nakajima, Mitsuru Wada, Kazuhiro Satomi, Kengo Kusano
Majority of ventricular tachycardias (VTs) are caused by scar-related macroreentry in patients with cardiac sarcoidosis. These VTs usually exhibit the reentry circuit on electroanatomic maps. We here describe a rare case of VT that exhibits a focal activation pattern on the electroanatomic map despite reentrant VT.
June 2017: Clinical Case Reports
Ute Lina Fahlenkamp, Ivan Diaz Ramirez, Moritz Wagner, Carsten Schwenke, Alexander Huppertz, Bernd Hamm, Alexander Lembcke
Background Computed tomography (CT) of the left atrium (LA) is performed prior to pulmonary vein isolation (PVI) to improve success of circumferential ablation for atrial fibrillation. The ablation procedure itself exposes patients to substantial radiation doses, therefore radiation dose reduction in pre-ablational imaging is of concern. Purpose To assess and compare diagnostic performance of low-radiation dose preprocedural CT in patients scheduled for PVI using two types of reconstruction algorithms. Material and Methods Forty-six patients (61 ± 10 years) scheduled for PVI were enrolled in this study irrespective of body-mass-index or cardiac rhythm at examination...
January 1, 2017: Acta Radiologica
Adrienne E Campbell-Washburn, Mohammad A Tavallaei, Mihaela Pop, Elena K Grant, Henry Chubb, Kawal Rhode, Graham A Wright
Cardiac magnetic resonance imaging (MRI) is appealing to guide complex cardiac procedures because it is ionizing radiation-free and offers flexible soft-tissue contrast. Interventional cardiac MR promises to improve existing procedures and enable new ones for complex arrhythmias, as well as congenital and structural heart disease. Guiding invasive procedures demands faster image acquisition, reconstruction and analysis, as well as intuitive intraprocedural display of imaging data. Standard cardiac MR techniques such as 3D anatomical imaging, cardiac function and flow, parameter mapping, and late-gadolinium enhancement can be used to gather valuable clinical data at various procedural stages...
October 2017: Journal of Magnetic Resonance Imaging: JMRI
Konstantinos P Letsas, Michael Efremidis, Konstantinos Vlachos, Stamatis Georgopoulos, Nikolaos Karamichalakis, Dimitrios Asvestas, Kosmas Valkanas, Panagiotis Korantzopoulos, Tong Liu, Antonios Sideris
Aims: Epicardial structural abnormalities at the right ventricular outflow tract (RVOT) may provide the arrhythmia substrate in Brugada syndrome (BrS). Electroanatomical endocardial unipolar voltage mapping is an emerging tool that accurately identifies epicardial abnormalities in different clinical settings. This study investigated whether endocardial unipolar voltage mapping of the RVOT detects electroanatomical abnormalities in patients with BrS. Methods and results: Ten asymptomatic patients (8 males, 34...
May 2, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
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 re-entry 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...
August 2017: Minerva Cardioangiologica
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"