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Electro Anatomical Mapping

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https://www.readbyqxmd.com/read/27943299/a-non-fluoroscopic-technique-for-coronary-arteries-three-dimensional-mapping-during-epicardial-ventricular-tachycardia-ablation
#1
Vittorio Calzolari, Gaetano Barbato, Martino Crosato, Luca DE Mattia, Alessandro Daniotti, Stefano Indiani, Paolo Antonio Maria Squasi, Zoran Olivari
When performing epicardial ablation of ventricular tachycardia (VT) caution must be taken not to damage the coronary arteries. We report a case in which a new, non-fluoroscopic technique for incorporating an accurate, real-time reconstruction of the main coronary vessels into a three-dimensional electro-anatomic map was used for epicardial VT ablation. This article is protected by copyright. All rights reserved.
December 10, 2016: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/27918346/electrical-stimulation-for-seizure-induction-and-functional-mapping-in-stereoelectroencephalography
#2
Agnès Trébuchon, Patrick Chauvel
The challenge in epilepsy surgery is to remove the epileptogenic zone without compromising postoperative function. Electrical stimulation (ES) was developed to identify with greater anatomical and physiological precision cortical structures essential to language and motor function. Because the language network is widely distributed in the left (dominant) hemisphere, and often varies among patients, brain mapping should delineate eloquent areas at the individual level. Although ES for language is commonly performed during a presurgical investigation, the procedure remains nonstandardized among centers, and differences between grids and intracerebral depth electrodes (stereoelectroencephalography) should be taken into account when comparing results from different series...
December 2016: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/27915262/procedural-outcomes-of-fluoroless-catheter-ablation-outside-the-traditional-catheterization-lab
#3
Amee M Bigelow, Philip C Smith, Dylan T Timberlake, Neil L McNinch, Grace L Smith, John R Lane, John M Clark
AIMS: Non-fluoroscopic catheter ablation is becoming routine. In experienced centres, fluoroscopy is rarely required. The use of a traditional catheterization lab (cath lab) may no longer be necessary. We began performing catheter ablations at a paediatric centre outside the traditional cardiac cath lab in 2013. The purpose of this study was to compare procedural features of paediatric catheter ablation performed outside the cath lab to those performed within a cath lab. METHODS AND RESULTS: We prospectively looked at patients presenting to the paediatric centre with supraventricular tachycardia (SVT) undergoing catheter ablation outside the cath lab in a standard operating room (OR group)...
December 2, 2016: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/27870969/preliminary-experience-with-high-density-electroanatomical-mapping-for-ablation-of-atrial-fibrillation-comparison-of-mini-basket-and-novel-open-irrigated-magnetic-ablation-catheter-in-consecutive-patients
#4
Jedrzej Kosiuk, Sebastian Hilbert, Silke John, Livio Bertagnolli, Gerhard Hindricks, Andreas Bollmann
BACKGROUND: Recently, a novel electroanatomic mapping system enabling rapid and automatic acquisition of high-resolution maps has been introduced. Previous reports focused on system use in combination with a mini-basket catheter. However, a novel system-specific, magnet-enabled ablation catheter eliminates the need for the mini-basket catheter and can potentially reduce procedure complexity and cost. Here we present our first experience from two consecutive case series using both procedural settings...
February 1, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/27853943/endocardial-voltage-mapping-of-pulmonary-veins-with-an-ultra-high-resolution-system-to-evaluate-atrial-myocardial-extensions
#5
Francesco Santoro, Christian Sohns, Ardan M Saguner, Natale Daniele Brunetti, Christine Lemes, Shibu Mathew, Christian-H Heeger, Bruno Reißmann, Tilman Maurer, Johannes Riedl, Thomas Fink, Kentaro Hayashi, Feifan Ouyang, Matteo Di Biase, Karl-Heinz Kuck, Andreas Metzner
INTRODUCTION: Atrial fibrillation (AF) is mainly triggered by arrhythmogenic foci originating from atrial myocardial extensions (MEs) into the pulmonary veins (PVs). Aim of the study was to evaluate endocardial voltage maps of PVs as a surrogate parameter for the extent of MEs in subjects with AF through a ultra-high-density mapping system. METHODS: Sixty-four bipolar electrograms were recorded simultaneously from the Orion mini-basket catheter placed in 72 PVs of 18 consecutive patients with paroxysmal/persistent AF undergoing PV isolation (PVI)...
November 16, 2016: Clinical Research in Cardiology: Official Journal of the German Cardiac Society
https://www.readbyqxmd.com/read/27773399/a-novel-approach-in-the-use-of-radiofrequency-catheter-ablation-of-septal-hypertrophy-in-hypertrophic-obstructive-cardiomyopathy
#6
Abhijeet B Shelke, Rajeev Menon, Anuj Kapadiya, Sachin Yalagudri, Daljeet Saggu, Sandeep Nair, C Narasimhan
OBJECTIVE: Alcohol septal ablation (ASA) is a therapeutic alternative to surgical myectomy in patients with hypertrophic obstructive cardiomyopathy (HOCM). However, the anatomical variability of the septal branch, risk of complete heart block, and late onset ventricular arrhythmias are limitations to its therapeutic usage. There is recent interest in the use of radiofrequency catheter ablation (RFCA) as a therapeutic option in HOCM. We aimed to assess the safety and efficacy of RFCA in the treatment of symptomatic HOCM...
September 2016: Indian Heart Journal
https://www.readbyqxmd.com/read/27748433/optogenetics-design-of-mechanistically-based-stimulation-patterns-for-cardiac-defibrillation
#7
Claudia Crocini, Cecilia Ferrantini, Raffaele Coppini, Marina Scardigli, Ping Yan, Leslie M Loew, Godfrey Smith, Elisabetta Cerbai, Corrado Poggesi, Francesco S Pavone, Leonardo Sacconi
Current rescue therapies for life-threatening arrhythmias ignore the pathological electro-anatomical substrate and base their efficacy on a generalized electrical discharge. Here, we developed an all-optical platform to examine less invasive defibrillation strategies. An ultrafast wide-field macroscope was developed to optically map action potential propagation with a red-shifted voltage sensitive dye in whole mouse hearts. The macroscope was implemented with a random-access scanning head capable of drawing arbitrarily-chosen stimulation patterns with sub-millisecond temporal resolution allowing precise epicardial activation of Channelrhodopsin2 (ChR2)...
October 17, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27733459/catheter-ablation-for-ventricular-tachycardia-following-surgical-treatment-of-pulmonary-stenosis-with-intact-ventricular-septum
#8
Bingbo Hou, Lihui Zheng, Guodong Niu, Lingmin Wu, Yu Qiao, Wei Sun, Ligang Ding, Gang Chen, Shu Zhang, Reginald Liew, Yan Yao
AIMS: This study was aimed to report the characteristics and treatment of ventricular tachycardia (VT) following surgical treatment of pulmonary stenosis with intact ventricular septum. METHODS AND RESULTS: Five patients underwent radiofrequency catheter ablation for sustained monomorphic left bundle branch block (LBBB) type VT who previously underwent surgical treatment of pulmonary stenosis. Except stimulation, voltage and activation mapping was performed using three-dimensional (3D) electro-anatomic mapping and ablation was applied accordingly...
October 12, 2016: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/27676164/implantation-of-single-lead-cardioverter-defibrillator-with-floating-atrial-sensing-dipole-in-a-pregnant-patient-without-using-fluoroscopy
#9
Fabio Quartieri, Daniele Giacopelli, Matteo Iori, Nicola Bottoni
In this case report, we look into the implant procedure of a single-lead ICD with floating atrial sensing dipole in a pregnant woman, without using fluoroscopy. This system benefits the proper positioning of the lead. This is possible thanks to the simultaneous display of both the atrial and ventricular dipoles on the electro-anatomical mapping system. This technique may be taken into consideration for the few rare cases where fluoroscopy is absolutely contraindicated.
March 2016: Indian Pacing and Electrophysiology Journal
https://www.readbyqxmd.com/read/27663606/a-novel-approach-for-left-ventricular-lead-placement-in-cardiac-resynchronization-therapy-intraprocedural-integration-of-coronary-venous-electroanatomic-mapping-with-delayed-enhancement-cardiac-magnetic-resonance-imaging
#10
Uyên Châu Nguyên, Masih Mafi-Rad, Jean-Paul Aben, Martijn W Smulders, Elien B Engels, Antonius M W van Stipdonk, Justin G L M Luermans, Sebastiaan C A M Bekkers, Frits W Prinzen, Kevin Vernooy
BACKGROUND: Placing the left ventricular (LV) lead at a site of late electrical activation remote from scar is desired to improve cardiac resynchronization therapy (CRT) response. OBJECTIVE: The purpose of this study was to integrate coronary venous electroanatomic mapping (EAM) with delayed enhancement cardiac magnetic resonance (DE-CMR) enabling LV lead guidance to the latest activated vein remote from scar. METHODS: Eighteen CRT candidates with focal scar on DE-CMR were prospectively included...
January 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/27646458/combined-right-ventricular-outflow-tract-epicardial-and-endocardial-late-potential-ablation-for-treatment-of-brugada-storm-a-case-report-and-review-of-the-literature
#11
Sandeep A Saha, Kousik Krishnan, Christopher Madias, Richard G Trohman
A 34-year-old man with Brugada syndrome (BrS) presented with electrical storm, manifested as multiple appropriate shocks from his implantable cardioverter-defibrillator over a period of 7 hours. He had not tolerated prior treatment with quinidine, and had self-discontinued cilostazol citing persistent palpitations. After stabilization with intravenous isoproterenol, an electrophysiology study was performed but no spontaneous or induced ventricular ectopic beats were identified. A three-dimensional (3D) endocardial electro-anatomic map of the right ventricular outflow tract (RVOT), pulmonic valve, and pulmonary artery, as well as a 3D epicardial map of the RVOT, were created...
December 2016: Cardiology and Therapy
https://www.readbyqxmd.com/read/27546816/association-of-left-atrial-epicardial-adipose-tissue-with-electrogram-bipolar-voltage-and-fractionation-electrophysiologic-substrates-for-atrial-fibrillation
#12
Tarek Zghaib, Esra Gucuk Ipek, Sohail Zahid, Muhammad Adnan Balouch, Satish Misra, Hiroshi Ashikaga, Ronald D Berger, Joseph E Marine, David D Spragg, Stefan L Zimmerman, Vadim Zipunnikov, Natalia Trayanova, Hugh Calkins, Saman Nazarian
BACKGROUND: Epicardial adipose tissue (EAdT) is metabolically active and likely contributes to atrial fibrillation (AF) through the release of inflammatory cytokines into the myocardium or through its rich innervation with ganglionated plexi at the pulmonary vein ostia. The electrophysiologic mechanisms underlying the association between EAdT and AF remain unclear. OBJECTIVE: The purpose of this study was to investigate the association of EAdT with adjacent myocardial substrate...
December 2016: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/27307519/a-prospective-study-of-ripple-mapping-the-post-infarct-ventricular-scar-to-guide-substrate-ablation-for-ventricular-tachycardia
#13
Vishal Luther, Nick W F Linton, Shahnaz Jamil-Copley, Michael Koa-Wing, Phang Boon Lim, Norman Qureshi, Fu Siong Ng, Sajad Hayat, Zachary Whinnett, D Wyn Davies, Nicholas S Peters, Prapa Kanagaratnam
BACKGROUND: Post-infarct ventricular tachycardia is associated with channels of surviving myocardium within scar characterized by fractionated and low-amplitude signals usually occurring late during sinus rhythm. Conventional automated algorithms for 3-dimensional electro-anatomic mapping cannot differentiate the delayed local signal of conduction within the scar from the initial far-field signal generated by surrounding healthy tissue. Ripple mapping displays every deflection of an electrogram, thereby providing fully informative activation sequences...
June 2016: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/27247012/premature-termination-of-radiofrequency-delivery-during-pulmonary-vein-isolation-due-to-oesophageal-temperature-alerts-impact-on-acute-and-chronic-pulmonary-vein-reconnection
#14
Milena Leo, Michala F Pedersen, Kim Rajappan, Matthew Ginks, Yaver Bashir, Timothy R Betts
AIMS: Oesophageal temperature monitoring is currently used during atrial fibrillation (AF) ablation to prevent atrio-oesophageal fistula. The aim of our study was to investigate if oesophageal temperature alerts, leading to early termination of radiofrequency (RF) energy and/or reduction in power during pulmonary vein isolation, can promote pulmonary vein reconnection (PVR). METHODS AND RESULTS: Patients undergone two consecutive AF ablation procedures with a three-dimensional electro-anatomical mapping system and oesophageal temperature monitoring were studied...
May 31, 2016: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/27170873/pre-to-intraoperative-data-fusion-framework-for-multimodal-characterization-of-myocardial-scar-tissue
#15
Antonio R Porras, Gemma Piella, Antonio Berruezo, Juan Fernández-Armenta, Alejandro F Frangi
Merging multimodal information about myocardial scar tissue can help electrophysiologists to find the most appropriate target during catheter ablation of ventricular arrhythmias. A framework is presented to analyze and combine information from delayed enhancement magnetic resonance imaging (DE-MRI) and electro-anatomical mapping data. Using this information, electrical, mechanical, and image-based characterization of the myocardium are performed. The presented framework allows the left ventricle to be segmented by DE-MRI and the scar to be characterized prior to the intervention based on image information...
2014: IEEE Journal of Translational Engineering in Health and Medicine
https://www.readbyqxmd.com/read/27122744/outcome-of-circumferential-pulmonary-vein-isolation-for-ablation-of-atrial-fibrillation-a-single-center-experience
#16
Jien-Jiun Chen, Fu-Chun Chiu, Su-Kiat Chua, Chieh-Cheh Yu, Lian-Yu Lin, Chia-Ti Tsai, Ling-Ping Lai, Jiunn-Lee Lin
BACKGROUND: Atrial fibrillation (AF) is the most common heart rhythm disorder in adults. Currently, use of the circumferential pulmonary vein isolation (CPVI) technique is the cornerstone of ablation therapy for paroxysmal atrial fibrillation. In this report, we described our ablation strategy and outcomes when treating a limited number of AF patients. METHODS: This study enrolled patients with paroxysmal or persistent AF that were resistant to at least one anti-arrhythmia drug...
September 2013: Acta Cardiologica Sinica
https://www.readbyqxmd.com/read/27117088/semi-supervised-clustering-of-fractionated-electrograms-for-electroanatomical-atrial-mapping
#17
Andres Orozco-Duque, John Bustamante, German Castellanos-Dominguez
BACKGROUND: Electrogram-guided ablation procedures have been proposed as an alternative strategy consisting of either mapping and ablating focal sources or targeting complex fractionated electrograms in atrial fibrillation (AF). However, the incomplete understanding of the mechanism of AF makes difficult the decision of detecting the target sites. To date, feature extraction from electrograms is carried out mostly based on the time-domain morphology analysis and non-linear features. However, their combination has been reported to achieve better performance...
April 26, 2016: Biomedical Engineering Online
https://www.readbyqxmd.com/read/27108940/feasibility-accuracy-%C3%A2-and-safety-of-3-dimensional-electroanatomic-mapping-without-fluoroscopy-in-patients-with-congenital-heart-defects
#18
Apinya Bharmanee, Srinath Gowda, Harinder R Singh
BACKGROUND: Use of nonfluoroscopic 3-dimensional electroanatomic mapping (NF-3DEAM) in patients with congenital heart defects (CHDs) is not well reported. OBJECTIVE: The purpose of this study was to evaluate the feasibility, accuracy, and safety of NF-3DEAM in patients with CHDs. METHODS: Retrospective review of electrophysiologic study (EPS) in patients with CHD from 2009 to 2013 was conducted. Patients undergoing EPS with NF-3DEAM using the EnSite NavX system (St...
August 2016: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/27094470/biophysical-modeling-predicts-ventricular-tachycardia-inducibility-and-circuit-morphology-a-combined-clinical-validation-and-computer-modeling-approach
#19
Zhong Chen, Rocio Cabrera-Lozoya, Jatin Relan, Manav Sohal, Anoop Shetty, Rashed Karim, Herve Delingette, Jaswinder Gill, Kawal Rhode, Nicholas Ayache, Peter Taggart, Christopher Aldo Rinaldi, Maxime Sermesant, Reza Razavi
INTRODUCTION: Computational modeling of cardiac arrhythmogenesis and arrhythmia maintenance has made a significant contribution to the understanding of the underlying mechanisms of arrhythmia. We hypothesized that a cardiac model using personalized electro-anatomical parameters could define the underlying ventricular tachycardia (VT) substrate and predict reentrant VT circuits. We used a combined modeling and clinical approach in order to validate the concept. METHODS AND RESULTS: Non-contact electroanatomic mapping studies were performed in 7 patients (5 ischemics, 2 non-ischemics)...
July 2016: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/27086166/integration-of-electro-anatomical-and-imaging-data-of-the-left-ventricle-an-evaluation-framework
#20
David Soto-Iglesias, Constantine Butakoff, David Andreu, Juan Fernández-Armenta, Antonio Berruezo, Oscar Camara
Integration of electrical and structural information for scar characterization in the left ventricle (LV) is a crucial step to better guide radio-frequency ablation therapies, which are usually performed in complex ventricular tachycardia (VT) cases. This integration requires finding a common representation where to map the electrical information from the electro-anatomical map (EAM) surfaces and tissue viability information from delay-enhancement magnetic resonance images (DE-MRI). However, the development of a consistent integration method is still an open problem due to the lack of a proper evaluation framework to assess its accuracy...
August 2016: Medical Image Analysis
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