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https://www.readbyqxmd.com/read/28776822/ripple-mapping-initial-multicenter-experience-of-an-intuitive-approach-to-overcoming-the-limitations-of-3d-activation-mapping
#1
Vishal Luther, Nuno Cortez-Dias, Luis Carpinteiro, João de Sousa, Richard Navaratnum Balasubramaniam, Sharad C Agarwal, David Farwell, Solomon Mark Sopher, Girish Babu, Richard Till, Nikki Jones, Stuart Tan, Anthony Chow, Martin Lowe, Jem Lane, Naveen Pappachan, Nick Wf Linton, Prapa Kanagaratnam
BACKGROUND: Ripple Mapping (RM) displays electrograms as moving bars over a 3D surface displaying bipolar voltage, and has shown in a single-center series to be effective for atrial tachycardia (AT) mapping without annotation of local activation time or window-of-interest assignment. We tested the reproducibility of these findings in operators naive to RM, using it for the first time in post ablation AT. METHODS: Maps were collected with multielectrode catheters and CARTO ConfiDENSE...
August 4, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/28706589/catheter-ablation-of-atrial-fibrillation-facilitated-by-preprocedural-three-dimensional-transesophageal-echocardiography-long-term-outcome
#2
Klaus Kettering, Felix Gramley, Stephan von Bardeleben
AIM: To evaluate the long-term outcome of catheter ablation of atrial fibrillation (AF) facilitated by preprocedural three-dimensional (3-D) transesophageal echocardiography. METHODS: In 50 patients, 3D transesophageal echocardiography (3D TEE) was performed immediately prior to an ablation procedure (paroxysmal AF: 30 patients, persistent AF: 20 patients). The images were available throughout the ablation procedure. Two different ablation strategies were used. In most of the patients with paroxysmal AF, the cryoablation technique was used (Arctic Front Balloon, CryoCath Technologies/Medtronic; group A2)...
June 26, 2017: World Journal of Cardiology
https://www.readbyqxmd.com/read/28674778/the-temporal-behavior-and-consistency-of-bipolar-atrial-electrograms-in-human-persistent-atrial-fibrillation
#3
Tiago P Almeida, Gavin S Chu, Michael J Bell, Xin Li, João L Salinet, Nawshin Dastagir, Jiun H Tuan, Peter J Stafford, G André Ng, Fernando S Schlindwein
The unstable temporal behavior of atrial electrical activity during persistent atrial fibrillation (persAF) might influence ablation target identification, which could explain the conflicting persAF ablation outcomes in previous studies. We sought to investigate the temporal behavior and consistency of atrial electrogram (AEG) fractionation using different segment lengths. Seven hundred ninety-seven bipolar AEGs were collected with three segment lengths (2.5, 5,and 8 s) from 18 patients undergoing persAF ablation...
July 3, 2017: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/28643171/elimination-of-the-negative-component-of-the-unipolar-electrogram-as-a-local-procedural-endpoint-during-paroxysmal-atrial-fibrillation-catheter-ablation-using-contact-force-sensing-the-uniforce-study
#4
Agustín Bortone, Philippe Lagrange, Bruno Cauchemez, Cyril Durand, Pierre Dieuzaide, Sébastien Prévot, Alexis Mechulan, Thomas Pambrun, Ruairidh Martin, Pauline Parlier, Alexandre Masse, Eloi Marijon, Jean-Paul Albenque
PURPOSE: Elimination of the negative component of the unipolar atrial electrogram is a reliable indicator of the creation of a transmural lesion. Contact-force (CF) sensing technology has the potential to increase the durability of pulmonary vein isolation (PVI). In the present multicenter study, we assessed the 2-year sinus rhythm (SR) maintenance rate in patients with paroxysmal atrial fibrillation (PAF) after PVI guided by these two approaches. METHODS: Two hundred fifteen consecutive PAF patients (62...
September 2017: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
https://www.readbyqxmd.com/read/28543607/successful-ablation-of-a-right-atrium-axillary-ventricular-accessory-pathway-associated-with-wolff-parkinson-white-syndrome
#5
Yuan Yuan, Deyong Long, Jianzeng Dong, Ling Tao, Changsheng Ma
We report a case of a patient with right axillary ventricular. Similar congenital anomaly of the right atrium was reported as "right appendage diverticulum or right atrial diverticulum". However, this independent chamber has its own annulus, synchronizes with the right ventricular, and generates large ventricular potential. Under the guidance of CARTO mapping system, a right atrioventricular accessory pathway associated with Type B Wolff-Parkinson-White syndrome was ablated successfully. This pathway was close to the annulus of the axillary ventricular...
May 24, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28492985/catheter-ablation-of-paroxysmal-atrial-fibrillation-circumferential-pulmonary-vein-ablation-success-rates-with-and-without-exclusion-of-areas-adjacent-to-the-esophagus
#6
Klaus Kettering, Dag-Hau Yim, Alexander Benz, Felix Gramley
BACKGROUND: Catheter ablation has become the first line of therapy in patients with symptomatic, recurrent, drug-refractory paroxysmal atrial fibrillation. Circumferential pulmonary vein ablation is still the standard approach in these patients. The occurrence of an atrioesophageal fistula is a rare but life-threatening complication after such ablation procedures. This is due to the fact that the esophagus does frequently have a very close anatomical relationship to the left or right pulmonary vein ostia...
May 10, 2017: Clinical Research in Cardiology: Official Journal of the German Cardiac Society
https://www.readbyqxmd.com/read/28447159/catheter-ablation-of-persistent-atrial-fibrillation-beneficial-effect-of-a%C3%A2-short-term-adjunctive-amiodarone-therapy-on-the-long-term-outcome
#7
Klaus Kettering, Felix Gramley
BACKGROUND: Catheter ablation has become the first line therapy in patients with symptomatic, recurrent, drug-refractory atrial fibrillation. Circumferential pulmonary vein ablation is still the standard approach in these patients. However, the results are not very favorable (especially in patients with persistent atrial fibrillation). Therefore, more complex ablation strategies and the usefulness of (short-term) adjunctive antiarrhythmic drug therapy are a matter of discussion. The aim of this study was to analyze whether short-term amiodarone therapy after catheter ablation (3 months) has a positive effect on the success rates after circumferential pulmonary vein ablation in patients with persistent atrial fibrillation...
April 26, 2017: Herzschrittmachertherapie & Elektrophysiologie
https://www.readbyqxmd.com/read/28370919/an-automatic-and-accurate-registration-method-for-electro-anatomical-map-and-ct-surface
#8
Lixia Shu, Jin Wang, Deyong Long, Changyan Lin
BACKGROUND: Electro-anatomical maps (EAM) and CT surface registration are widely used for catheter navigation in atrial fibrillation ablations. However, few studies have investigated the registration algorithm. Moreover, some of them are semiautomatic, so that physicians must be proficient; some are inaccurate for catheter navigation. A both automatic and accurate registration method is needed. METHOD: A Hausdorff distance based approach (HD) was proposed for EAM/CT registration...
March 29, 2017: International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS
https://www.readbyqxmd.com/read/28343787/relationship-between-rotors-and-complex-fractionated-electrograms-in-atrial-fibrillation-using-a-novel-computational-analysis
#9
Pedro Adragão, Pedro Carmo, Diogo Cavaco, João Carmo, António Ferreira, Francisco Moscoso Costa, Maria Salomé Carvalho, João Mesquita, Rita Quaresma, Francisco Belo Morgado, Miguel Mendes
INTRODUCTION: Rotors and complex fractionated atrial electrograms (CFAEs) have been suggested as possible therapeutic targets in ablation of atrial fibrillation (AF). The aim of this study was to assess the relationship between rotors and CFAEs in patients with AF. METHODS: We studied 18 patients with AF (mean age 69±8 years, 33% female) who underwent rotor ablation and pulmonary vein isolation. Endocardial mapping was performed with a basket catheter to identify the presence, number and location of rotors and CFAEs...
April 2017: Portuguese Journal of Cardiology: An Official Journal of the Portuguese Society of Cardiology
https://www.readbyqxmd.com/read/28318819/slow-pathway-radiofrequency-ablation-using-magnetic-navigation-a-description-of-technique-and-retrospective-case-analysis
#10
Abhishek Bhaskaran, Maha Albarri, Neil Ross, Sara Al Raisi, Rahul Samantha, Leonette Roode, Fazlur Nadri, Jeanette Ng, Stuart Thomas, Aravinda Thiagalingam, Pramesh Kovoor
BACKGROUND: The Magnetic Navigation System (MNS) catheter was shown to be stable in the presence of significant cardiac wall motion and delivered more effective lesions compared to manual control. This stability could potentially make AV junctional reentrant tachycardia (AVNRT) ablation safer. The aim of this study is to describe the method of mapping and ablation of AVNRT with MNS and 3-D electro-anatomical mapping system (CARTO, Biosense Webster, Diamond bar, CA, USA) anatomical mapping, with a view to improve the safety of ablation...
February 21, 2017: Heart, Lung & Circulation
https://www.readbyqxmd.com/read/28243805/radiofrequency-catheter-ablation-for-redo-procedures-after-pulmonary-vein-isolation-with-the-cryoballoon-technique-long-term-outcome
#11
Klaus Kettering, Felix Gramley
BACKGROUND: Catheter ablation has become the first line of therapy in patients with symptomatic, recurrent, drug-refractory atrial fibrillation (AF). Cryoablation has been shown to be a safe and effective technique for pulmonary vein (PV) isolation. However, the arrhythmia recurrence rate is high after cryoablation procedures. Radiofrequency catheter ablation has been shown to be an effective strategy for redo procedures in these patients and to provide a favourable outcome during midterm follow-up...
February 27, 2017: Herzschrittmachertherapie & Elektrophysiologie
https://www.readbyqxmd.com/read/28144262/staged-hybrid-ablation-for-persistent-and-longstanding-persistent-atrial-fibrillation-effectively-restores-sinus-rhythm-in-long-term-observation
#12
Michal Zembala, Krzysztof Filipiak, Oskar Kowalski, Piotr Buchta, Tomasz Niklewski, Pawel Nadziakiewicz, Rafał Koba, Mariusz Gąsior, Zbigniew Kalarus, Marian Zembala
INTRODUCTION: Hybrid ablation (HABL) of atrial fibrillation combining endoscopic, minimally invasive, closed chest epicardial ablation with endocardial CARTO-guided accuracy was introduced to overcome the limitations of current therapeutic options for patients with persistent (PSAF) and longstanding persistent atrial fibrillation (LSPAF). The purpose of this study was to evaluate the procedural safety and feasibility as well as effectiveness of HABL in patients with PSAF and LSPAF 1 year after the procedure...
February 1, 2017: Archives of Medical Science: AMS
https://www.readbyqxmd.com/read/28063269/novel-mapping-technique-for-localization-of-focal-and-reentrant-activation-during-atrial-fibrillation
#13
Yoshihide Takahashi, Shinsuke Iwai, Syu Yamashita, Mayumi Masumura, Masahito Suzuki, Kento Yabe, Yasuhiro Sato, Kenzo Hirao, Mitsuaki Isobe
INTRODUCTION: Identification of wavefront propagation pattern during AF remains challenging in ablation procedures. We sought to test a novel combination of a new mapping technology called Ripple Map and high-density mapping to distinguish focal and reentrant activation during atrial fibrillation (AF). METHODS AND RESULTS: Subjects were patients undergoing ablation for persistent AF. If AF remained after isolation of the pulmonary veins, the left atrium (LA) was mapped by a high-density mapping catheter for later analysis, after which ablation was continued using a conventional stepwise approach...
April 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/28054727/direct-comparison-of-point-by-point-and-rapid-ultra-high-resolution-electroanatomical-mapping-in-patients-scheduled-for-ablation-of-atrial-fibrillation
#14
Laura Rottner, Andreas Metzner, Feifan Ouyang, Christian Heeger, Kentaro Hayashi, Thomas Fink, Christine Lemes, Shibu Mathew, Tilman Maurer, Bruno REIßMANN, Enida Rexha, Johannes Riedl, Ardan M Saguner, Francesco Santoro, Karl-Heinz Kuck, Christian Sohns
INTRODUCTION: Three-dimensional electroanatomical mapping (EAM) is an established tool facilitating catheter ablation. In this context, the novel Rhythmia system sets a new bar in fast high-resolution mapping. The aim of this study was to directly compare point-by-point versus rapid ultra-high-resolution EAM in patients scheduled for ablation of atrial fibrillation (AF) with focus on procedural data, acute success, and midterm clinical outcome. METHODS AND RESULTS: A total number of 74 consecutive patients (48/74 male) with symptomatic AF were scheduled to undergo pulmonary vein isolation (PVI) using either Carto or Rhythmia...
March 2017: Journal of Cardiovascular 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
#15
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/28026917/voltage-combined-with-pace-mapping-is-simple-and-effective-for-ablation-of-noninducible-premature-ventricular-contractions-originating-from-the-right-ventricular-outflow-tract
#16
Zefeng Wang, Heping Zhang, Hui Peng, Xuhua Shen, Zhijun Sun, Can Zhao, Ruiqing Dong, Huikuan Gao, Yongquan Wu
BACKGROUND: Premature ventricular contractions (PVCs) from the right ventricular outflow tract (RVOT) can resist conventional mapping strategies. Studies regarding optimal mapping and ablation methods for patients with noninducible RVOT-PVCs are limited. We retrospectively evaluated the efficacy and safety of a novel mapping strategy for these cases: voltage mapping combined with pace mapping. HYPOTHESIS: METHODS: We retrospectively included symptomatic patients (n = 148; 76 males; age, 44...
December 2016: Clinical Cardiology
https://www.readbyqxmd.com/read/28018976/identifying-the-third-dimension-in-2d-fluoroscopy-to-create-3d-cardiac-maps
#17
Jasbir Sra, David Krum, Indrajit Choudhuri, Barry Belanger, Mark Palma, Donald Brodnick, Daniel B Rowe
Three-dimensional cardiac mapping is important for optimal visualization of the heart during cardiac ablation for the treatment of certain arrhythmias. However, many hospitals and clinics worldwide cannot afford the high cost of the current mapping systems. We set out to determine if, using predefined algorithms, comparable 3D cardiac maps could be created by a new device that relies on data generated from single-plane fluoroscopy and patient recording and monitoring systems, without the need for costly equipment, infrastructure changes, or specialized catheters...
December 22, 2016: JCI Insight
https://www.readbyqxmd.com/read/27982678/disparity-between-two-dimensional-echocardiographic-and-electroanatomic-left-and-right-atrial-volumes-in-patients-undergoing-catheter-ablation-for-long-standing-persistent-atrial-fibrillation
#18
L Škňouřil, Š Havránek, V Bulková, M Dorda, T Paleček, J Šimek, Z Fingrová, A Linhart, J Januška, D Wichterle, M Fiala
Left atrial (LA) volume (LAV) is used for the selection of patients with atrial fibrillation (AF) to rhythm control strategies. Calculation of LAV from the LA diameters and areas by two-dimensional (2D) echocardiography may result in significant error. Accuracy of atrial volume assessment has never been studied in patients with long-standing persistent AF (LSPAF) and significant atrial remodeling. This study investigated correlation and agreement between 2D echocardiographic (Simpson method) and electroanatomic (CARTO, Biosense Webster) left and right atrial (RA) volumes (LAV(ECHO) vs...
May 4, 2017: Physiological Research
https://www.readbyqxmd.com/read/27886610/integration-of-intracardiac-echocardiography-and-computed-tomography-during-atrial-fibrillation-ablation-combining-ultrasound-contours-obtained-from-the-right-atrium-and-ventricular-outflow-tract
#19
Kohki Nakamura, Shigeto Naito, Kenichi Kaseno, Yosuke Nakatani, Takehito Sasaki, Naofumi Anjo, Eiji Yamashita, Koji Kumagai, Nobusada Funabashi, Yoshio Kobayashi, Shigeru Oshima
BACKGROUND: We aimed to optimize the acquisition of the left atrial (LA) and pulmonary vein (PV) ultrasound contours for more accurate integration of intracardiac echocardiography (ICE) and computed tomography (CT) using the CARTO(®) 3 system during atrial fibrillation (AF) ablation. METHODS: Eighty-five AF patients underwent integration of ICE and CT using (1) the LA roof and posterior wall contours acquired from the right atrium (RA), (2) all LA/PV contours from the RA (Whole-RA-integration), (3) the LA roof/posterior wall contours from the RA and right ventricular outflow tract (RVOT) (Posterior-RA/RV-integration), and (4) all LA/PV contours from the RA and RVOT (Whole-RA/RV-integration)...
February 1, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/27763695/use-of-new-imaging-carto%C3%A2-segmentation-module-software-to-facilitate-ablation-of-ventricular-arrhythmias
#20
Oholi Tovia-Brodie, Bernard Belhassen, Aharon Glick, Haim Shmilovich, Galit Aviram, Raphael Rosso, Yoav Michowitz
INTRODUCTION: A new imaging software (CARTO® Segmentation Module, Biosense Webster) allows preprocedural 3-D reconstruction of all heart chambers based on cardiac CT. We describe our initial experience with the new module during ablation of ventricular arrhythmias. METHODS AND RESULTS: Eighteen consecutive patients with idiopathic ventricular arrhythmias or ischemic ventricular tachycardia (VT) were studied. In the latter group, a combined endocardial and epicardial ablation was performed...
February 2017: Journal of Cardiovascular Electrophysiology
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