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Cardiac electroanatomic mapping

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https://www.readbyqxmd.com/read/28680604/atrial-flutter-in-a-patient-with-atrial-septal-defect-and-anomalous-venous-drainage-unusual-approach-for-ablation
#1
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
#2
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
https://www.readbyqxmd.com/read/28677509/therapy-of-cardiac-arrhythmias-in-children-an-emerging-role-of-electroanatomical-mapping-systems
#3
Casale Matteo, Mezzetti Maurizio, Tulino Viviana, Michele Scarano, Busacca Paolo, Dattilo Giuseppe
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
#4
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
#5
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
https://www.readbyqxmd.com/read/28588820/endocardial-and-epicardial-focal-activation-pattern-due-to-microreentry-ventricular-tachycardia-in-a-patient-with-cardiac-sarcoidosis
#6
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
https://www.readbyqxmd.com/read/28513211/image-quality-of-low-radiation-dose-left-atrial-ct-using-filtered-back-projection-and-an-iterative-reconstruction-algorithm-intra-individual-comparison-in-unselected-patients-undergoing-pulmonary-vein-isolation
#7
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
https://www.readbyqxmd.com/read/28493526/real-time-mri-guidance-of-cardiac-interventions
#8
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...
May 11, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28472282/right-ventricular-outflow-tract-high-density-endocardial-unipolar-voltage-mapping-in-patients-with-brugada-syndrome-evidence-for-electroanatomical-abnormalities
#9
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
https://www.readbyqxmd.com/read/28409519/off-line-analysis-of-electro-anatomical-mapping-in-ventricular-arrhythmias
#10
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
https://www.readbyqxmd.com/read/28347634/ten-year-outcomes-of-monomorphic-ventricular-tachycardia-catheter-ablation-in-repaired-tetralogy-of-fallot
#11
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/28340078/image-integration-into-3-dimensional-electro-anatomical-mapping-system-facilitates-safe-ablation-of-ventricular-arrhythmias-originating-from-the-aortic-root-and-its-vicinity
#12
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
#13
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/28279745/novel-algorithm-for-accelerated-electroanatomic-mapping-and-prediction-of-earliest-activation-of-focal-cardiac-arrhythmias-using-mathematical-optimization
#14
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...
June 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
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
#15
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...
June 2017: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
https://www.readbyqxmd.com/read/28160298/fluoroless-catheter-ablation-of-cardiac-arrhythmias-a-5-year-experience
#16
Mansour Razminia, Michael Cameron Willoughby, Hany Demo, Hesam Keshmiri, Theodore Wang, Oliver J D'Silva, Terry A Zheutlin, Hakeem Jibawi, Paul Okhumale, Richard F Kehoe
BACKGROUND: Catheter ablations have been traditionally performed with the use of fluoroscopic guidance, which exposes the patient and staff to the inherent risks of radiation. We have developed techniques to eliminate the use of fluoroscopy during cardiac ablations and have been performing completely fluoroless catheter ablations on our patients for over 5 years. METHODS: We present a retrospective analysis of the safety, efficacy, and feasibility data from 500 consecutive patients who underwent nonfluoroscopic catheter ablation, targeting a total of 639 arrhythmias, including atrioventricular reciprocating tachycardia (AVRT), atrioventricular nodal reentrant tachycardia (AVNRT), atrial tachycardia (AT), atrial fibrillation (AF), premature ventricular contractions (PVCs), and ventricular tachycardia (VT)...
February 3, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28066827/optimized-left-ventricular-endocardial-stimulation%C3%A2-is-superior-to-optimized-epicardial%C3%A2-stimulation-in-ischemic-patients-with%C3%A2-poor-response-to-cardiac-resynchronization%C3%A2-therapy-a%C3%A2-combined-magnetic-resonance-imaging-electroanatomic%C3%A2-contact-mapping-and-hemodynamic
#17
Jonathan M Behar, Tom Jackson, Eoin Hyde, Simon Claridge, Jaswinder Gill, Julian Bostock, Manav Sohal, Bradley Porter, Mark O'Neill, Reza Razavi, Steve Niederer, Christopher Aldo Rinaldi
OBJECTIVES: The purpose of this study was to identify the optimal pacing site for the left ventricular (LV) lead in ischemic patients with poor response to cardiac resynchronization therapy (CRT). BACKGROUND: LV endocardial pacing may offer benefit over conventional CRT in ischemic patients. METHODS: We performed cardiac magnetic resonance, invasive electroanatomic mapping (EAM), and measured the acute hemodynamic response (AHR) in patients with existing CRT systems...
December 2016: JACC. Clinical Electrophysiology
https://www.readbyqxmd.com/read/28045674/play-the-map-ablation-of-a-macro-reentrant-atrial-tachycardia-in-a-patient-after-senning-repair-for-transposition-of-the-great-arteries
#18
Emre Yalcinkaya, Firat Duru, Matthias Greutmann, Thomas Wolber
A 50-year-old male patient who had undergone Senning repair for transposition of the great arteries at the age of 7 years was referred to our electrophysiology lab with recurrent supraventricular tachycardias. Fast anatomical mapping of the systemic venous atrium was performed with the CARTO electroanatomical mapping system. Propagation mapping with animated dynamic maps facilitates the understanding of the underlying mechanism and provides visualization of reentrant circuits of tachycardias in cardiac chambers with native barriers and surgical scars...
2017: Journal of Invasive Cardiology
https://www.readbyqxmd.com/read/27995637/active-atrial-function-and-atrial-scar-burden-after-multiple-catheter-ablations-of-persistent-atrial-fibrillation
#19
Jana M Nührich, Anne C Geisler, Daniel Steven, Boris A Hoffmann, Benjamin Schäffer, Gunnar Lund, Christian Stehning, Ulf K Radunski, Arian Sultan, Michael Schwarzl, Gerhard Adam, Stephan Willems, Kai Muellerleile
BACKGROUND: Extensive and repeated substrate modification (SM) is frequently performed as an ablation strategy in persistent atrial fibrillation (persAF). The effect of these extended ablation strategies on atrial function has not been investigated sufficiently so far. The purpose was to assess atrial function by cardiac magnetic resonance (CMR) and its association with left atrial (LA) scar burden by electroanatomical voltage-mapping after multiple persAF ablation procedures. METHODS: We included 16 persAF patients who had ≥2 SM procedures and a control group (CG) of 21 persAF patients without prior ablation...
February 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/27989791/coronary-sinus-activation-patterns-in-patients-with-and-without-left-bundle-branch-block-undergoing-electroanatomic-mapping-system-guided-cardiac-resynchronization-therapy-device-implantation
#20
Maurizio Del Greco, Alessandro Zorzi, Irene Di Matteo, Anna Cima, Massimiliano Maines, Carlo Angheben, Domenico Catanzariti
BACKGROUND: implantation of the left ventricular (LV) lead in segments with delayed electrical activation may improve response to cardiac resynchronization therapy (CRT). OBJECTIVE: to evaluate amount and regional distribution of LV electrical delay (LVED) in patients with or without left bundle branch block (LBBB). METHODS: we enrolled 60 patients who underwent electroanatomic mapping system-guided CRT implantation. Activation mapping of the coronary sinus (CS) branches was performed using an insulated guide wire...
October 27, 2016: Heart Rhythm: the Official Journal of the Heart Rhythm Society
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