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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
#1
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)...
November 9, 2016: 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
#2
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...
October 20, 2016: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/27762474/accuracy-of-voltage-signal-measurement-during-radiofrequency-delivery-through-the-smarttouch-catheter
#3
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...
October 20, 2016: 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
#4
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
#5
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
#6
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
#7
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
#8
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...
June 9, 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
#9
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
https://www.readbyqxmd.com/read/27189294/vascular-plug-assisted-retrograde-transvenous-obliteration-parto-for-gastric-varix-bleeding-patients-in-the-emergent-clinical-setting
#10
Taehwan Kim, Heechul Yang, Chun Kyon Lee, Gun Bea Kim
PURPOSE: To evaluate the technical feasibility and safety of vascular plug assisted retrograde transvenous obliteration (PARTO) for bleeding gastric varix performed in the emergent clinical setting and describe the mid-term clinical results. MATERIALS AND METHODS: From April 2012 to January 2015, emergent PARTO was tried in total 9 patients presented with active gastric varix bleeding. After initial insufficient or failure of endoscopic approach, they underwent PARTO in the emergent clinical setting...
July 2016: Yonsei Medical Journal
https://www.readbyqxmd.com/read/27152144/impact-of-computed-tomography-image-and-contact-force-technology-on-catheter-ablation-for-atrial-fibrillation
#11
Ibrahim Marai, Mahmoud Suleiman, Miry Blich, Jonathan Lessick, Sobhi Abadi, Monther Boulos
AIM: To investigate the impact of using computed tomography (CT) and contact force (CF) technology on recurrence of atrial tachyarrhythmia after atrial fibrillation (AF) ablation. METHODS: This non-randomized study included 2 groups of patients. All patients had symptomatic recurrent paroxysmal or persistent AF and were treated with at least 1 anti arrhythmic medication or intolerant to medication. The first group included 33 patients who underwent circumferential pulmonary veins isolation (PVI) for AF during 2012 and 2013 guided by CT image integration (Cartomerge, Biosense Webster, Diamond Bar, CA, United States) of left atrium and pulmonary veins into an electroanatomic mapping (EAM) system (CT group) using standard irrigated radiofrequency catheter (ThermoCool, Carto, Biosense Webster, Diamond Bar, CA, United States) or irrigated catheter with integrated CF sensor (Smart Touch, Carto, Biosense Webster, Diamond Bar, CA, United States)...
April 26, 2016: World Journal of Cardiology
https://www.readbyqxmd.com/read/27092195/usefulness-of-combined-carto-electroanatomical-mapping-and-manifest-entrainment-in-ablating-adenosine-triphosphate-sensitive-atrial-tachycardia-originating-from-the-atrioventricular-node-vicinity
#12
Ken Okumura, Shingo Sasaki, Masaomi Kimura, Daisuke Horiuchi, Kenichi Sasaki, Taihei Itoh, Hirofumi Tomita, Yuji Ishida, Takahiko Kinjo
BACKGROUND: By using a noncontact mapping system, adenosine triphosphate (ATP)-sensitive atrial tachycardia (ATP-AT) originating from the atrioventricular (AV) node vicinity was successfully ablated at the entrance to the slow conduction zone indicated by the manifest entrainment technique. We aimed to prospectively validate the efficacy of the combination of CARTO electroanatomical mapping and manifest entrainment in ablating this ATP-AT. METHODS: Of the 27 AT patients from January 2013 to March 2014, 6 patients with sustained ATP-AT were studied (age, 67±13 years; tachycardia cycle length, 350±95 ms)...
April 2016: Journal of Arrhythmia
https://www.readbyqxmd.com/read/27090771/transbaffle-multielectrode-mapping-of-atrial-flutter-post-double-switch-operation
#13
Shouvik Haldar, Andreu Porta-Sanchez, Erwin Oechslin, Eugene Downar, Lee Benson, Krishnakumar Nair
A 26-year-old woman with congenitally corrected transposition of the great arteries (ccTGA) had undergone a double-switch corrective surgery consisting of a Mustard procedure (bovine pericardial baffles and hemashield grafts) and arterial switch (Jatene technique). She subsequently developed drug refractory atrial flutter and underwent ablation. An Agilis sheath (St Jude Medical, USA) and a long BRK 1 needle was used for the transbaffle puncture guided by transoesophageal echocardiography. Activation maps of the systemic venous antrum (SVA) and then the PVA (Fig...
April 19, 2016: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/26979468/electroanatomic-mapping-and-transoesophageal-echocardiography-for-near-zero-fluoroscopy-during-complex-left-atrial-ablation
#14
Hariharan Raju, John Whitaker, Carly Taylor, Matthew Wright
BACKGROUND: We evaluated Carto 3, transoesophageal echocardiography (TOE) and contact force (CF) sensing catheter in atrial fibrillation (AF) ablation. METHODS: Unselected consecutive ablations performed under general anaesthesia (GA) were studied with modified protocol (cases, n=11) and compared to retrospective consecutive controls (n=10). Patent foramen ovale (PFO) or single transseptal puncture enabled left atrial (LA) access; ablation strategy was stepwise approach...
July 2016: Heart, Lung & Circulation
https://www.readbyqxmd.com/read/26955726/-impact-of-cha2ds2-vasc-score-on-substrate-for-persistent-atrial-fibrillation-and-outcome-post-catheter-ablation-of-atrial-fibrillation
#15
Tang Ribo, Dong Jianzeng, Liu Xiaohui, Shang Meisheng, Yu Ronghui, Long Deyong, Du Xin, Kang Junping, Wu Jiahui, Ning Man, Sang Caihua, Jiang Chenxi, Bai Rong, Li Songnan, Yao Yan, Wen Songnan, Ma Changsheng
OBJECTIVE: To explore if CHA2DS2 VASc score can predict substrate for persistent atrial fibrillation ( AF) and outcome post catheter ablation of AF. METHODS: From January 2011 to December 2012,116 patients underwent catheter ablation of persistent AF in our department and were enrolled in this study. CHA2DS2VASc score was calculated as follows: two points were assigned for a history of stroke or transient ischemic attack and age ≥ 75 and 1 point each was assigned for age ≥ 65, a history of hypertension, diabetes,recent cardiac failure, vessel disease, female...
August 2015: Zhonghua Xin Xue Guan Bing za Zhi
https://www.readbyqxmd.com/read/26914407/minimizing-discordances-in-automated-classification-of-fractionated-electrograms-in-human-persistent-atrial-fibrillation
#16
Tiago P Almeida, Gavin S Chu, João L Salinet, Frederique J Vanheusden, Xin Li, Jiun H Tuan, Peter J Stafford, G André Ng, Fernando S Schlindwein
Ablation of persistent atrial fibrillation (persAF) targeting complex fractionated atrial electrograms (CFAEs) detected by automated algorithms has produced conflicting outcomes in previous electrophysiological studies. We hypothesize that the differences in these algorithms could lead to discordant CFAE classifications by the available mapping systems, giving rise to potential disparities in CFAE-guided ablation. This study reports the results of a head-to-head comparison of CFAE detection performed by NavX (St...
February 25, 2016: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/26878316/cardiac-electrophysiology-procedures-guided-by-novel-non-fluoroscopic-catheter-tracking-systems
#17
EDITORIAL
Laurent Macle, Bernard Thibault, Jason G Andrade
No abstract text is available yet for this article.
2016: Expert Review of Medical Devices
https://www.readbyqxmd.com/read/26873564/use-of-3d-electroanatomical-navigation-carto-3-to-minimize-or-eliminate-fluoroscopy-use-in-the-ablation-of-pediatric-supraventricular-tachyarrhythmias
#18
Lakshmi Nagaraju, Dipika Menon, Peter F Aziz
BACKGROUND: Radiation exposure related to medical procedures carries known medical risk. Electrophysiology (EP) and catheter ablation procedures are traditionally performed under fluoroscopic guidance. Three-dimensional (3D) electroanatomical navigation systems decrease or eliminate fluoroscopy use in EP procedures. OBJECTIVE: The aim of this study was to assess the efficacy and outcome of a minimal or no fluoroscopic electroanatomical mapping approach for catheter ablations for supraventricular tachycardia (SVT) in the pediatric population...
June 2016: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/26814840/respiratory-gating-algorithm-helps-to-reconstruct-more-accurate-electroanatomical-maps-during-atrial-fibrillation-ablation-performed-under-spontaneous-respiration
#19
Gábor Széplaki, László Gellér, Emin Evren Özcan, Tamás Tahin, Orsolya Mária Kovács, Nóra Parázs, Júlia Karády, Pál Maurovich-Horvat, Szabolcs Szilágyi, István Osztheimer, Attila Tóth, Béla Merkely
PURPOSE: Electroanatomical mapping is a useful tool during the ablation of atrial fibrillation. Respiratory movement might influence the mapping accuracy and merging. This study aims to investigate the effect of respiratory gating on the accuracy of magnetic-field-based electroanatomical mapping under spontaneous respiration. METHODS: Fifty-one consecutive patients (35 male, aged 30-78 years) who underwent left atrial radiofrequency catheter ablation due to atrial fibrillation were included...
August 2016: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
https://www.readbyqxmd.com/read/26805664/non-fluoroscopic-navigation-systems-for-radiofrequency-catheter-ablation-for-supraventricular-tachycardia-reduce-ionising-radiation-exposure
#20
Jason See, Jonah L Amora, Sheldon Lee, Paul Lim, Wee Siong Teo, Boon Yew Tan, Kah Leng Ho, Chee Wan Lee, Chi-Keong Ching
INTRODUCTION: The use of non-fluoroscopic systems (NFS) to guide radiofrequency catheter ablation (RFCA) for the treatment of supraventricular tachycardia (SVT) is associated with lower radiation exposure. This study aimed to determine if NFS reduces fluoroscopy time, radiation dose and procedure time. METHODS: We prospectively enrolled patients undergoing RFCA for SVT. NFS included EnSiteTM NavXTM or CARTO® mapping. We compared procedure and fluoroscopy times, and radiation exposure between NFS and conventional fluoroscopy (CF) cohorts...
July 2016: Singapore Medical Journal
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