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Electroanatomic mapping

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https://www.readbyqxmd.com/read/29784681/use-of-intracardiac-echocardiography-in-interventional-cardiology-working-with-the-anatomy-rather-than-fighting-it
#1
REVIEW
Andres Enriquez, Luis C Saenz, Raphael Rosso, Frank E Silvestry, David Callans, Francis E Marchlinski, Fermin Garcia
The indications for catheter-based structural and electrophysiological procedures have recently expanded to more complex scenarios, in which an accurate definition of the variable individual cardiac anatomy is key to obtain optimal results. Intracardiac echocardiography (ICE) is a unique imaging modality able to provide high-resolution real-time visualization of cardiac structures, continuous monitoring of catheter location within the heart, and early recognition of procedural complications, such as pericardial effusion or thrombus formation...
May 22, 2018: Circulation
https://www.readbyqxmd.com/read/29778240/the-autonomic-neural-mechanism-of-right-ventricular-outflow-tract-tachycardia
#2
Hung-Yu Chang, Li-Wei Lo, Yu-Ruey Chen, Yu-Hui Chou, Wei-Lun Lin, Yenn-Jiang Lin, Wei-Hsian Yin, An-Ning Feng, Shih-Ann Chen
BACKGROUND: Ventricular tachycardia (VT) and ventricular premature complexes (VPCs) originating from the right ventricular outflow tract (RVOT) are generally considered as benign arrhythmias, with ECG morphology showing LBBB pattern and inferior axis. Pathogenic mechanisms in the genesis of RVOT VT/VPC remain largely unknown. We aimed to investigate the neural mechanism in RVOT ventricular arrhythmias in canine model. METHODS: Twelve mongrel dogs (13.7 ± 1...
July 2018: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/29759782/regional-left-ventricular-electrical-activation-and-peak-contraction-are-closely-related-in-candidates-for-cardiac-resynchronization-therapy
#3
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/29759537/real-time-localization-of-ventricular-tachycardia-origin-from-the-12-lead-electrocardiogram
#4
John L Sapp, Meir Bar-Tal, Adam J Howes, Jonathan E Toma, Ahmed El-Damaty, James W Warren, Paul J MacInnis, Shijie Zhou, B Milan Horáček
OBJECTIVES: The aim of this study was to develop rapid computational methods for identifying the site of origin of ventricular activation from the 12-lead electrocardiogram. BACKGROUND: Catheter ablation of ventricular tachycardia in patients with structural heart disease frequently relies on a substrate-based approach, which may use pace mapping guided by body-surface electrocardiography to identify culprit exit sites. METHODS: Patients undergoing ablation of scar-related VT (n = 38) had 12-lead electrocardiograms recorded during pacing at left ventricular endocardial sites (n = 1,012) identified on 3-dimensional electroanatomic maps and registered to a generic left ventricular endocardial surface divided into 16 segments and tessellated into 238 triangles; electrocardiographic data were reduced for each lead to 1 variable, consisting of QRS time integral...
July 2017: JACC. Clinical Electrophysiology
https://www.readbyqxmd.com/read/29759533/12-lead-electrocardiogram-to-localize-region-of-abnormal-electroanatomic-substrate-in-arrhythmogenic-right-ventricular-cardiomyopathy
#5
Cory M Tschabrunn, Haris M Haqqani, Pasquale Santangeli, Erica S Zado, Francis E Marchlinski
OBJECTIVES: The purpose of this study was to evaluate the relationship between electrocardiogram (ECG) QRS fragmentation (fQRS) and right ventricular (RV) endocardial (ENDO) and epicardial (EPI) electroanatomic substrate abnormalities in patients with arrhythmogenic right ventricular cardiomyopathy (ARVC). BACKGROUND: fQRS is frequently observed in patients with ARVC and reflects delayed conduction due to RV fibrosis. METHODS: A total of 30 consecutive patients met the task force criteria for ARVC (19 men, mean age 41...
July 2017: JACC. Clinical Electrophysiology
https://www.readbyqxmd.com/read/29759439/high-density-electroanatomical-mapping-to-identify-point-of-epicardial-to-endocardial-breakthrough-in-perimitral-flutter
#6
Markus B Sikkel, Vishal Luther, Arunashis Sau, Fernando Guerrero, Fu Siong Ng, Phang Boon Lim
No abstract text is available yet for this article.
June 2017: JACC. Clinical Electrophysiology
https://www.readbyqxmd.com/read/29753180/a-work-flow-to-build-and-validate-patient-specific-left-atrium-electrophysiology-models-from-catheter-measurements
#7
Cesare Corrado, Steven Williams, Rashed Karim, Gernot Plank, Mark O'Neill, Steven Niederer
Biophysical models of the atrium provide a physically constrained framework for describing the current state of an atrium and allow predictions of how that atrium will respond to therapy. We propose a work flow to simulate patient specific electrophysiological heterogeneity from clinical data and validate the resulting biophysical models. In 7 patients, we recorded the atrial anatomy with an electroanatomical mapping system (St Jude Velocity); we then applied an S1-S2 electrical stimulation protocol from the coronary sinus (CS) and the high right atrium (HRA) whilst recording the activation patterns using a PentaRay catheter with 10 bipolar electrodes at 12 ± 2 sites across the atrium...
April 27, 2018: Medical Image Analysis
https://www.readbyqxmd.com/read/29736557/the-seamless-integration-of-three-dimensional-rotational-angiography-images-into-electroanatomical-mapping-systems-to-guide-catheter-ablation-of-atrial-fibrillation
#8
Satoshi Fujita, Eitaro Fujii, Yoshihiko Kagawa, Katsuhiro Inoue, Tsuyoshi Yamada, Masaaki Ito
It is important to visually confirm radiofrequency ablation lesions during atrial fibrillation (AF) ablation for procedural efficiency, which requires the integration of a three-dimensional (3D) left atrial image reconstructed from computed tomography (CT) or a magnetic resonance imaging. However, an EP Navigator allows seamless integration of 3D anatomy obtained through 3D rotational angiography (3D-ATG) into an electroanatomical mapping system. We hypothesized that 3D-ATG can be used during AF ablation while significantly reducing the effective dose (ED) and without compromising image morphology compared to a 3D-CT image...
May 7, 2018: Heart and Vessels
https://www.readbyqxmd.com/read/29730348/epicardial-intraoperative-3-d-mapping-of-wolff-parkinson-white-in-a-child-with-ebstein-s-anomaly
#9
James C Perry, Andras Bratincsak, Suzanne Shepard, Matthew R Williams, Joseph Loslo, Raghav Murthy, John J Lamberti
Catheter ablation of arrhythmias in small patients has inherent significant risk due to patient, catheter, and lesion size. Heart block, perforation and coronary damage may occur. This report shows adaptation of a 3-D electroanatomic mapping system for intraoperative use in a small patient with Ebstein's anomaly undergoing Cone procedure and bidirectional Glenn. Use of this technique gave clear identification of the epicardial insertion points of two accessory pathways causing Wolff-Parkinson-White and resistant episodes of supraventricular tachycardia...
May 3, 2018: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/29721116/ventricular-tachycardia-storm-originating-from-interventricular-septum-successfully-treated-with-surgical-cryoablation-with-electroanatomic-and-electrophysiological-mapping-before-dual-valve-replacement
#10
Iwanari Kawamura, Seiji Fukamizu, Satoshi Miyazawa, Rintaro Hojo, Fusahiko Ito, Masazumi Watanabe, Mitsuhiro Nishizaki, Harumizu Sakurada, Masayasu Hiraoka
A 58-year-old man with dilated cardiomyopathy was admitted with heart failure. He had a history of two catheter ablation procedures for ventricular tachycardia (VT) originating from the intraventricular septum (IVS). Before dual valve replacement (DVR), he suffered a VT storm. An electrophysiological study revealed an extended low-voltage area at the IVS with the exit of the induced VT at the anterior side. Radiofrequency application was performed at the VT exit as a landmark for surgical cryoablation (SA)...
February 2018: Journal of Arrhythmia
https://www.readbyqxmd.com/read/29716710/catheter-ablation-for-electrical-storm-in-brugada-syndrome-results-of-substrate-based-ablation
#11
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/29702740/localization-of-ventricular-activation-origin-using-patient-specific-geometry-preliminary-results
#12
Shijie Zhou, John L Sapp, Amir AbdelWahab, Petr Šťovíček, B Milan Horáček
BACKGROUND AND OBJECTIVES: Catheter ablation of ventricular tachycardia (VT) may include induction of VT and localization of VT-exit site. Our aim was to assess localization performance of a novel statistical pace-mapping method and compare it with performance of an electrocardiographic inverse solution. METHODS: Seven patients undergoing ablation of VT (4 with epicardial, 3 with endocardial exit) aided by electroanatomic mapping underwent intraprocedural 120-lead body-surface potential mapping (BSPM)...
April 27, 2018: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29680971/use-of-impedance-based-catheter-tip-to-tissue-contact-assessment-electroanatomic-coupling-index-eci-in-typical-right-atrial-flutter-ablation
#13
Massimiliano Maines, Francesco Peruzza, Alessandro Zorzi, Domenico Catanzariti, Carlo Angheben, Maurizio Del Greco
PURPOSE: The electrical coupling index (ECI) (Abbott, USA) is a marker of tissue contact and ablation depth developed particularly for atrial fibrillation treatment. We sought to evaluate if these measures can be also a marker of lesion efficacy during cavotricuspid isthmus (CTI) ablation for typical right atrial flutter. METHODS: We assessed the ECI values in patients undergoing typical right atrial flutter point-by-point ablation guided by the Ensite Velocity Contact™ (St...
April 21, 2018: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
https://www.readbyqxmd.com/read/29663562/atrial-fibrillation-ablation-using-cryoballoon-technology-recent-advances-and-practical-techniques
#14
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/29658207/ablation-induced-change-in-the-course-of-fascicular-tachycardia
#15
Avishag Laish-Farkash, Avi Sabbag, Michael Glikson, Aharon Glick, Vladimir Khalameizer, Amos Katz, Yoav Michowitz
BACKGROUND: Multiform fascicular tachycardia (FT) was recently described as a ventricular tachycardia (VT) that has a reentrant mechanism using multiple fascicular branches and produces alternate fascicular VT forms. Ablating the respective fascicle may cause a change in the reentrant circuit resulting in a change in morphology. Ablation of the septal fascicle is crucial for successful treatment. OBJECTIVES: To describe four cases of FT in which ablation induced a change in QRS morphologies and aggravated clinical course...
January 2018: Israel Medical Association Journal: IMAJ
https://www.readbyqxmd.com/read/29618475/novel-measure-of-local-impedance-predicts-catheter-tissue-contact-and-lesion-formation
#16
Matthew S Sulkin, Jacob I Laughner, Sebastian Hilbert, Suraj Kapa, Jedrzej Kosiuk, Paul Younan, Iñaki Romero, Allan Shuros, Jason J Hamann, Gerhard Hindricks, Andreas Bollmann
BACKGROUND: Coupling between the ablation catheter and myocardium is critical to resistively heat tissue with radiofrequency ablation. The objective of this study was to evaluate whether a novel local impedance (LI) measurement on an ablation catheter identifies catheter-tissue coupling and is predictive of lesion formation. METHODS AND RESULTS: LI was studied in explanted hearts (n=10 swine) and in vivo (n=10; 50-70 kg swine) using an investigational electroanatomic mapping system that measures impedance from an ablation catheter with mini-electrodes incorporated in the distal electrode (Rhythmia and IntellaNav MiFi OI, Boston Scientific)...
April 2018: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/29617764/whole-human-heart-histology-to-validate-electroanatomical-voltage-mapping-in-patients-with-non-ischaemic-cardiomyopathy-and-ventricular-tachycardia
#17
Claire A Glashan, Alexander F A Androulakis, Qian Tao, Ross N Glashan, Lambertus J Wisse, Micaela Ebert, Marco C de Ruiter, Berend J van Meer, Charlotte Brouwer, Olaf M Dekkers, Daniel A Pijnappels, Jacques M T de Bakker, Marta de Riva, Sebastiaan R D Piers, Katja Zeppenfeld
Aims: Electroanatomical voltage mapping (EAVM) is an important diagnostic tool for fibrosis identification and risk stratification in non-ischaemic cardiomyopathy (NICM); currently, distinct cut-offs are applied. We aimed to evaluate the performance of EAVM to detect fibrosis by integration with whole heart histology and to identify the fibrosis pattern in NICM patients with ventricular tachycardias (VTs). Methods and results: Eight patients with NICM and VT underwent EAVM prior to death or heart transplantation...
March 29, 2018: European Heart Journal
https://www.readbyqxmd.com/read/29603755/impact-of-left-atrial-size-on-isolation-area-in-the-acute-phase-of-pulmonary-vein-isolation-using-28-mm-cryoballoon
#18
Akio Chikata, Takeshi Kato, Kazuo Usuda, Shuhei Fujita, Michiro Maruyama, Yoshiki Nagata, Satoru Sakagami, Naomi Kanamori, Takanori Yaegashi, Takahiro Saeki, Takashi Kusayama, Soichiro Usui, Hiroshi Furusho, Shuichi Kaneko, Masayuki Takamura
BACKGROUND: The impact of left atrial (LA) size on isolation area (ISA) using a 28-mm second-generation cryoballoon (CB) in the acute phase after pulmonary vein isolation (PVI) and the differences of CB from contact force-guided radiofrequency (RF) ablation have not been fully investigated. METHODS: We examined 85 consecutive patients (CB group, 35; RF group, 50) with drug-refractory paroxysmal atrial fibrillation who underwent their first PVI procedure at two institutions...
March 31, 2018: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/29600790/biatrial-electrical-and-structural-atrial-changes-in-heart-failure-electroanatomic-mapping-in-persistent-atrial-fibrillation-in-humans
#19
Sandeep Prabhu, Aleksandr Voskoboinik, Alex J A McLellan, Kah Y Peck, Bhupesh Pathik, Chrishan J Nalliah, Geoff R Wong, Sonia M Azzopardi, Geoffrey Lee, Justin Mariani, Liang-Han Ling, Andrew J Taylor, Jonathan M Kalman, Peter M Kistler
OBJECTIVES: This study sought to characterize the biatrial substrate in heart failure (HF) and persistent atrial fibrillation (PeAF). BACKGROUND: Atrial fibrillation (AF) and HF frequently coexist; however, the contribution of HF to the biatrial substrate in PeAF is unclear. METHODS: Consecutive patients with PeAF and normal left ventricular (NLV) systolic function (left ventricular ejection fraction [LVEF] >55%) or idiopathic cardiomyopathy (LVEF ≤45%) undergoing AF ablation were enrolled...
January 2018: JACC. Clinical Electrophysiology
https://www.readbyqxmd.com/read/29584897/magnetic-resonance-imaging-guidance-for-the-optimization-of-ventricular-tachycardia-ablation
#20
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
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