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https://www.readbyqxmd.com/read/27815807/in-situ-sensor-advancements-for-osteoporosis-prevention-diagnosis-and-treatment
#1
REVIEW
Luting Liu, Thomas J Webster
Osteoporosis is still a serious issue in healthcare, and will continue to increase due to the aging and growth of the population. Early diagnosis is the key to successfully treating many diseases. The earlier the osteoporosis is diagnosed, the more quickly people can take action to stop bone deterioration. Motivated by this, researchers and companies have begun developing smart in situ bone sensors in order to dramatically help people to monitor their bone mass density (BMD), bone strain or bone turnover markers (BTMs); promptly track early signs of osteoporosis; and even monitor the healing process following surgery or antiresorptive therapy...
November 4, 2016: Current Osteoporosis Reports
https://www.readbyqxmd.com/read/27788997/use-of-the-new-contact-force-sensing-ablation-catheter-dramatically-reduces-fluoroscopy-time-during-atrial-fibrillation-ablation-procedures
#2
Aditi Naniwadekar, Kamal Joshi, Allan Greenspan, Sumeet Mainigi
OBJECTIVES: To study the impact of contact force (CF) sensing on fluoroscopy, procedure, left atrial (LA) and ablation times and number of ablations during atrial fibrillation (AF) ablation. BACKGROUND: Catheter ablation is an effective treatment for symptomatic AF. Recently a new ablation catheter providing real-time CF has been approved for use. METHODS: A nested case-control study was performed comparing radiofrequency ablation of AF using the irrigated CF-sensing ThermoCool SmartTouch catheter versus open-irrigated ThermoCool SF catheter (Biosense Webster, Inc...
May 2016: Indian Pacing and Electrophysiology Journal
https://www.readbyqxmd.com/read/27763695/use-of-new-imaging-carto%C3%A2-segmentation-module-software-to-facilitate-ablation-of-ventricular-arrhythmias
#3
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/27702870/initial-clinical-results-with-the-thermocool%C3%A2-smarttouch%C3%A2-surround-flow-catheter
#4
Hanney Gonna, Giulia Domenichini, Zia Zuberi, Mark Norman, Riyaz Kaba, Alexander Grimster, Mark M Gallagher
AIM: The Biosense Webster ThermoCool(®) SmartTouch(®) Surround Flow (STSF) catheter is a recently developed ablation catheter incorporating Surround Flow (SF) technology to ensure efficient cooling and force sensing to quantify tissue contact. In our unit, it superseded the ThermoCool(®) SF catheter from the time of its introduction in May 2015. METHODS AND RESULTS: Procedure-related data were collected prospectively for the first 100 ablation procedures performed in our department using the STSF catheter...
October 4, 2016: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/27449903/ninety-seconds-could-be-the-optimal-duration-for-ventricular-radiofrequency-ablation-results-from-a-myocardial-phantom-model
#5
Abhishek Bhaskaran, Chrishan Nalliah, William Chik, Jim Pouliopoulos, Jeanette Ng, M A Barry, Fazlur Nadri, Sara Al Raisi, Juliana Dandach, Stuart Thomas, Pramesh Kovoor, Aravinda Thiagalingam
BACKGROUND: Shallow lesions could be the predominant factor affecting the efficacy of ventricular radiofrequency (RF) ablations. The objective of this study was to assess lesion dimensions and overheating in extended RF ablations up to 180seconds and compare with that of conventional 30seconds ablations. METHODS: The Navistar Thermocool irrigated catheter (Biosense Webster, CA, USA) was used in a previously validated myocardial phantom. Ablations were performed with 20W, 30W, 40W and 50W powers for 180seconds...
July 7, 2016: Heart, Lung & Circulation
https://www.readbyqxmd.com/read/27152144/impact-of-computed-tomography-image-and-contact-force-technology-on-catheter-ablation-for-atrial-fibrillation
#6
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/27090771/transbaffle-multielectrode-mapping-of-atrial-flutter-post-double-switch-operation
#7
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/26914407/minimizing-discordances-in-automated-classification-of-fractionated-electrograms-in-human-persistent-atrial-fibrillation
#8
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/26854279/contact-force-guided-deep-engagement-with-a-steerable-sheath-in-the-distal-great-cardiac-vein-a-case-report
#9
Y U Kumagai, Takanori Arimoto, Tadateru Iwayama, Naoaki Hashimoto, Tetsu Watanabe, Isao Kubota
Ablation of ventricular tachycardia originating from the great cardiac vein involves the difficult step of deep engagement with an ablation catheter. The catheter and a steerable sheath (MobiCath, Biosense Webster, Diamond Bar, CA, USA) were advanced alternately only when the contact force vector was parallel to the coronary venous system. Deep engagement with a steerable sheath ensured a powerful backup force during ablation.
May 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
#10
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/26643010/electromagnetic-contact-force-sensing-electrophysiological-catheters-how-accurate-is-the-technology
#11
Felix Bourier, Gabriele Hessling, Sonia Ammar-Busch, Marc Kottmaier, Alessandra Buiatti, Christian Grebmer, Marta Telishevska, Verena Semmler, Carsten Lennerz, Christine Schneider, Christof Kolb, Isabel Deisenhofer, Tilko Reents
BACKGROUND: Contact-force (CF) sensing catheters are increasingly used in clinical electrophysiological practice due to their efficacy and safety profile. As data about the accuracy of this technology are scarce, we sought to quantify accuracy based on in vitro experiments. METHODS AND RESULTS: A custom-made force sensor was constructed that allowed exact force reference measurements registered via a flexible membrane. A Smarttouch Surround Flow (ST SF) ablation catheter (Biosense Webster, Diamond Bar, CA, USA) was brought in contact with the membrane of the force sensor in order to compare the ST SF force measurements to force sensor reference measurements...
March 2016: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/26639913/transseptal-puncture-guided-by-ct-derived-3d-augmented-fluoroscopy
#12
Felix Bourier, Tilko Reents, Sonia Ammar-Busch, Verena Semmler, Marta Telishevska, Marc Kottmaier, Carsten Lennerz, Christian Grebmer, Christof Kolb, Isabel Deisenhofer, Gabriele Hessling
BACKGROUND: Transseptal puncture for left atrial (LA) access is still mainly performed using fluoroscopy and transesophageal or intracardiac echocardiography. We present an easily applicable approach for the guidance of transseptal puncture that uses the combination of a 3D-mapping system and CT-derived 3D-overlayed anatomy. METHODS AND RESULTS: A computer tomographic (CT) LA-angiography was performed in n = 65 patients prior to a scheduled atrial fibrillation ablation procedure...
March 2016: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/26603325/clinical-impact-of-contact-force-and-its-regional-variability-on-efficiency-and-effectiveness-of-pulmonary-vein-isolation-for-atrial-fibrillation
#13
Yohei Sotomi, Koichi Inoue, Takayuki Kikkawa, Koji Tanaka, Yuko Toyoshima, Takafumi Oka, Nobuaki Tanaka, Yoshiyuki Orihara, Katsuomi Iwakura, Yasushi Sakata, Kenshi Fujii
BACKGROUND: The purpose of this study is to analyze the impact of average contact force (CF) and its regional variability during pulmonary vein isolation (PVI) for atrial fibrillation (AF) on periprocedural parameters and midterm outcome. METHODS: This retrospective cohort study enrolled 57 drug-refractory AF patients who underwent initial PVI for AF using an open-irrigated CF catheter (SmartTouch Thermocool, Biosense Webster, Diamond Bar, CA, USA). Thirty patients were assigned to a lower CF (LCF) group (average CF≤10g) and 27 patients to a higher CF (HCF) group (average CF>10g)...
October 2016: Journal of Cardiology
https://www.readbyqxmd.com/read/26572501/dual-loop-bi-atrial-macroreentrant-atrial-tachycardia-in-a-patient-with-modified-cox-maze-iv-where-is-the-initial-ablation-target
#14
Takekuni Hayashi, Takeshi Mitsuhashi, Hideo Fujita, Shin-Ichi Momomura
No abstract text is available yet for this article.
May 2016: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/26552799/site-localization-of-painful-lesions-during-radiofrequency-ablation-of-pulmonary-veins-using-circular-multi-electrode-catheters
#15
Avishag Laish-Farkash, Amos Katz, Ornit Cohen, Azriel Osherov, Sharon Bruocha, Vladimir Khalameizer
PURPOSE: Previous data showed that pain sensation was common during pulmonary vein isolation (PVI) using an 8-mm radiofrequency (RF) ablation catheter. Pain was more common in the left pulmonary veins (PVs). We characterized the location of pain during PVI using circular multi-electrode ablation catheters. METHODS: Included are all consecutive patients with atrial fibrillation (AF) who underwent PVI using the phased RF PVAC® catheter (Medtronic) or the irrigated nMARQ™ catheter (Biosense Webster) under conscious sedation between July 2011 and March 2015...
January 2016: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
https://www.readbyqxmd.com/read/26359632/lesion-size-and-safety-comparison-between-the-novel-flex-tip-on-the-flexability-ablation-catheter-and-the-solid-tips-on-the-thermocool-and-thermocool-sf-ablation-catheters
#16
Jeffrey R Winterfield, James Jensen, Therese Gilbert, Francis Marchlinski, Andrea Natale, Douglas Packer, Vivek Reddy, Srijoy Mahapatra, David J Wilber
INTRODUCTION: Next-generation catheters have been developed to reduce irrigation volume and preserve power delivery. A novel design uses a flexible tip (FlexAbility™ catheter) that directs flow to the contact surface. Because of recent safety issues with new catheters, we undertook a study in a canine heart with 3 irrigated catheters to compare efficacy and safety. METHODS: Endocardial ablation was performed by 2 independent operators in 12 anesthetized canines with the FlexAbility (St...
January 2016: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/26318548/use-of-a-contact-force-sensing-ablation-catheter-with-advanced-catheter-location-significantly-reduces-fluoroscopy-time-and-radiation-dose-in-catheter-ablation-of-atrial-fibrillation
#17
Geoffrey Lee, Ross J Hunter, Matthew J Lovell, Malcom Finlay, Waqas Ullah, Victoria Baker, Mehul B Dhinoja, Simon Sporton, Mark J Earley, Richard J Schilling
AIMS: The aim of this study was to evaluate the 'real-world' impact of a novel contact force (CF)-sensing (SmartTouch™, Biosense Webster, Diamond Bar, CA, USA) catheter coupled with an advanced catheter location (ACL) system on fluoroscopy time and fluoroscopy dose during atrial fibrillation (AF) ablation. METHODS AND RESULTS: This was a retrospective observational cohort study of prospectively collected data of 1515 consecutive patients undergoing paroxysmal AF (PAF) and persistent AF (PerAF) ablation at a single institution between 2009 and 2014...
February 2016: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/26293688/change-in-qrs-morphology-during-extrasystole-ablation-what-is-the-mechanism
#18
Eduardo Arana-Rueda, Alvaro Arce-León, Lorena García-Riesco, Alonso Pedrote
No abstract text is available yet for this article.
November 2015: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/26249214/atrioventricular-nodal-reentrant-tachycardia-in-implantable-cardioverter-defibrillators-diagnosis-and-troubleshooting
#19
Andres Enriquez, Kenneth A Ellenbogen, Usama Boles, Adrian Baranchuk
Inappropriate therapies are frequent in patients with implantable cardioverter defibrillators (ICDs) and are associated with adverse outcomes, including increased mortality. Atrioventricular nodal reentrant tachycardia (AVNRT) is the most common reentrant supraventricular tachycardia (SVT) and a cause of inappropriate therapies in these patients. In the present article we review the problem of AVNRT in ICD patients with a focus on diagnosis and the available algorithms to improve arrhythmia discrimination and prevent inappropriate shocks...
August 7, 2015: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/26227785/distance-between-the-left-atrial-appendage-and-mitral-annulus-evaluated-by-carto-3-integrated-computed-tomography-imaging
#20
Gabriel Cismaru, Radu Rosu, Nihal El Kamar, Lucian Muresan, Mihai Puiu, Marius Andronache, Paul Puie, Roxana Matuz, Gabriel Gusetu, Dana Pop, Petru Adrian Mircea, Dumitru Zdrenghea
OBJECTIVE: To measure distances between pulmonary veins (PV) and mitral annulus (MA) using angiographic computed tomography (CT) and to compare them with the left atrial appendage-MA (LAA-MA) line. MATERIALS AND METHODS: Data from 46 catheter ablation procedures for atrial fibrillation involving 36 males, mean age 53 years, range 27-78 years, were analyzed. Three types of mitral isthmus lines were measured using angiographic CT images integrated in the CARTO 3 system (Biosense Webster): the distance between the right superior PV and MA (RSPV-MA), the right inferior PV and MA (RIPV-MA), and the left inferior PV and MA (LIPV-MA)...
2015: Medical Principles and Practice: International Journal of the Kuwait University, Health Science Centre
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