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https://www.readbyqxmd.com/read/28370919/an-automatic-and-accurate-registration-method-for-electro-anatomical-map-and-ct-surface
#1
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
#2
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
#3
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
#4
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
#5
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
#6
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
#7
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
#8
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
#9
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
#10
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
#11
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...
December 16, 2016: 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
#12
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
#13
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
https://www.readbyqxmd.com/read/27762474/accuracy-of-voltage-signal-measurement-during-radiofrequency-delivery-through-the-smarttouch-catheter
#14
Payam Safavi-Naeini, Dreema Zafar-Awan, Hongjian Zhu, Gerardo Zablah, Anand V Ganapathy, Abdi Rasekh, Mohammad Saeed, Joanna Esther Molina Razavi, Mehdi Razavi
INTRODUCTION: Current methods for measuring voltage during radiofrequency (RF) ablation (RFA) necessitate turning off the ablation catheter. If voltage could be accurately read without signal attenuation during RFA, turning off the catheter would be unnecessary, allowing continuous ablation. We evaluated the accuracy of the Thermocool SMARTTOUCH catheter for measuring voltage while RF traverses the catheter. METHODS AND RESULTS: We studied 26 patients undergoing RFA for arrhythmias...
January 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/27761246/bipolar-irrigated-radiofrequency-ablation-of-resistant-ventricular-tachycardia-with-a-septal-intramural-origin-the-initial-experience-and-a-description-of-the-method
#15
Artur Baszko, Wojciech Telec, Piotr Kałmucki, Piotr Iwachów, Karol Kochman, Radosław Szymański, Jan Kłopocki, Stefan Ożegowski, Andrzej Szyszka, Tomasz Siminiak
Bipolar radiofrequency (RF) ablation is effective in treatment of ventricular tachycardia originating from thick interventricular septum. The RF generator and CARTO system can be used to precisely and safely perform ablation. Standard ablation catheter can be used with indifferent ablation electrode connected to the electrode receptacle in RF generator with custom-made cable.
October 2016: Clinical Case Reports
https://www.readbyqxmd.com/read/27759818/frequency-and-risk-factors-for-the-birth-of-small-for-gestational-age-newborns-in-a-public-maternity-hospital
#16
Marina Parca Cavelagna Teixeira, Tatiana Peloso Reis Queiroga, Maria Dos Anjos Mesquita
Objective: To determine the frequency and risk factors of small-for-gestational-age newborns in a high-risk maternity. Methods: This is an observational, cross-sectional, and case-control study, conducted in a public tertiary care maternity hospital. Data from 998 newborns and their mothers were collected through interviews and review of medical records and prenatal care cards. Some placentas underwent histopathological analysis. The variables of small-for-gestational-age and non-small-for-gestational-age newborns and of their mothers were statistically compared by means of Student's t test, Fisher's exact test, and odds ratio...
July 2016: Einstein
https://www.readbyqxmd.com/read/27706179/noninvasive-imaging-of-human-atrial-activation-during-atrial-flutter-and-normal-rhythm-from-body-surface-potential-maps
#17
Zhaoye Zhou, Qi Jin, Long Yu, Liqun Wu, Bin He
BACKGROUND: Knowledge of atrial electrophysiological properties is crucial for clinical intervention of atrial arrhythmias and the investigation of the underlying mechanism. This study aims to evaluate the feasibility of a novel noninvasive cardiac electrical imaging technique in imaging bi-atrial activation sequences from body surface potential maps (BSPMs). METHODS: The study includes 7 subjects, with 3 atrial flutter patients, and 4 healthy subjects with normal atrial activations...
2016: PloS One
https://www.readbyqxmd.com/read/27307519/a-prospective-study-of-ripple-mapping-the-post-infarct-ventricular-scar-to-guide-substrate-ablation-for-ventricular-tachycardia
#18
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/27278517/clinical-utility-of-automated-ablation-lesion-tagging-based-on-catheter-stability-information-visitag-module-of-the-carto-3-system-with-contact-force-time-integral-during-pulmonary-vein-isolation-for-atrial-fibrillation
#19
Yasuo Okumura, Ichiro Watanabe, Kazuki Iso, Koichi Nagashima, Kazumasa Sonoda, Naoko Sasaki, Rikitake Kogawa, Keiko Takahashi, Kimie Ohkubo, Toshiko Nakai, Shiro Nakahara, Yuuichi Hori, Atsushi Hirayama
BACKGROUND: The clinical utility of an automated lesion tagging module based on catheter stability information (VisiTag) with the CARTO system during atrial fibrillation (AF) ablation remains to be established. We investigated whether VisiTag-guided extensive encircling pulmonary vein isolation (EEPVI) produces durable lesions. METHODS: The study involved 54 patients undergoing EEPVI for paroxysmal AF. We performed EEPVI guided by the module-generated ablation tags, i...
November 2016: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
https://www.readbyqxmd.com/read/27196507/long-postpacing-interval-after-entrainment-of-tachycardia-including-a-slow-conduction-zone-within-the-circuit
#20
Takahiko Kinjo, Shingo Sasaki, Masaomi Kimura, Shingen Owada, Daisuke Horiuchi, Kenichi Sasaki, Taihei Itoh, Yuji Ishida, Yoshihiro Shoji, Kimitaka Nishizaki, Yuichi Tsushima, Hirofumi Tomita, Ken Okumura
BACKGROUNDS: Postpacing interval (PPI) measured after entrainment pacing describes the distance between pacing site and reentrant circuit. However, the influential features to PPI remain to be elucidated. METHODS AND RESULTS: This study included 22 cases with slow/fast atrioventricular (AV) nodal reentrant tachycardia (AVNRT), 14 orthodromic AV reciprocating tachycardia (AVRT) using an accessary pathway, 22 typical atrial flutter (AFL), and 18 other macroreentrant atrial tachycardia (atypical AFL)...
August 2016: Journal of Cardiovascular Electrophysiology
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