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https://www.readbyqxmd.com/read/29600778/integrated-assessment-of-left-ventricular-electrical-activation-and-myocardial-strain-mapping-in-heart-failure-patients-a-holistic-diagnostic-approach-for-endocardial-cardiac-resynchronization-therapy-ablation-of-ventricular-tachycardia-and-biological-therapy
#1
Francesco Maffessanti, Frits W Prinzen, Giulio Conte, François Regoli, Maria Luce Caputo, Daniel Suerder, Tiziano Moccetti, Francesco Faletra, Rolf Krause, Angelo Auricchio
OBJECTIVES: This study sought to test the accuracy of strain measurements based on anatomo-electromechanical mapping (AEMM) measurements compared with magnetic resonance imaging (MRI) tagging, to evaluate the diagnostic value of AEMM-based strain measurements in the assessment of myocardial viability, and the additional value of AEMM over peak-to-peak local voltages. BACKGROUND: The in vivo identification of viable tissue, evaluation of mechanical contraction, and simultaneous left ventricular activation is currently achieved using multiple complementary techniques...
January 2018: JACC. Clinical Electrophysiology
https://www.readbyqxmd.com/read/29572086/influence-of-contact-force-on-voltage-mapping-a-combined-magnetic-resonance-imaging-and-electroanatomic-mapping-study-in-patients-with-tetralogy-of-fallot
#2
Elvis Teijeira-Fernandez, Hubert Cochet, Felix Bourier, Masateru Takigawa, Ghassen Cheniti, Nathaniel Thompson, Antonio Frontera, Claudia Camaioni, Gregoire Massouille, Zakaria Jalal, Nicolas Derval, Xavier Iriart, Arnaud Denis, Meleze Hocini, Michel Haissaguerre, Pierre Jais, Jean-Benoit Thambo, Frederic Sacher
BACKGROUND: Voltage criteria for ventricular mapping have been obtained from small series of patients and prioritizing high specificity. OBJECTIVE: Using tetralogy of Fallot as a model of transmural right ventricular (RV) scar and MRI as reference, we aimed to study the potential influence of contact force (CF) on voltage mapping and to define voltage cutoff values for RV scar. METHODS: Fourteen patients (age 32.6±14.3, 5 female) with repaired tetralogy of Fallot underwent high resolution cardiac MRI (1...
March 20, 2018: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/29364554/validation-of-a-novel-mapping-system-and-utility-for-mapping-complex-atrial-tachycardias
#3
S Honarbakhsh, R J Hunter, G Dhillon, W Ullah, E Keating, R Providencia, A Chow, M J Earley, R J Schilling
INTRODUCTION: This study sought to validate a novel wavefront mapping system utilizing whole-chamber basket catheters (CARTOFINDER, Biosense Webster). The system was validated in terms of (1) mapping atrial-paced beats and (2) mapping complex wavefront patterns in atrial tachycardia (AT). METHODS AND RESULTS: Patients undergoing catheter ablation for AT and persistent AF were included. A 64-pole-basket catheter was used to acquire unipolar signals that were processed by CARTOFINDER mapping system to generate dynamic wavefront propagation maps...
March 2018: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29326838/increasing-the-single-procedure-success-rate-of-pulmonary-vein-isolation
#4
Mattias Duytschaever, Mark O'Neill, Martin Martinek
To improve the single-procedural success and long-term outcomes of catheter ablation techniques for AF, there is a need for durable, contiguous and transmural lesions encircling the pulmonary veins (PV). Measurement of contact force (CF) between the catheter tip and the target tissue can optimise ablation procedures. A new approach to obtain single-procedure durable PV isolation (PVI) using the latest CF technology combined with the CARTO VISITAG™ Module with Ablation Index (Biosense Webster) has been shown in small studies to almost eliminate recurrence of paroxysmal AF at 1-year follow up and to make PVI procedures more reproducible...
December 2017: Arrhythmia & Electrophysiology Review
https://www.readbyqxmd.com/read/29317972/high-density-mapping-in-ventricular-tachycardia-ablation-a-pentaray-%C3%A2-study
#5
Petra Maagh, Arnd Christoph, Henning Dopp, Markus Sebastian Mueller, Gunnar Plehn, Axel Meissner
Background: High-density mapping of ventricular tachycardia (VT) with PentaRay® (Biosense-Webster) provides high resolution with discrimination of local abnormal electrograms and slow conducting channels. We evaluate the feasibility of PentaRay® to characterize the anatomical substrate and assume an influence of the outcome despite limitations. Methods: Over a 24-month period, 26 endocardial and four epicardial maps were obtained of 26 VT patients (18 ischemic cardiomyopathy (ICM, 69...
December 2017: Cardiology Research
https://www.readbyqxmd.com/read/29239758/efficacy-and-safety-comparison-between-different-types-of-novel-design-enhanced-open-irrigated-ablation-catheters-in-creating-cavo-tricuspid-isthmus-block
#6
Rikuta Hamaya, Shinsuke Miyazaki, Takatsugu Kajiyama, Tomonori Watanabe, Shigeki Kusa, Hiroaki Nakamura, Hitoshi Hachiya, Yoshito Iesaka
BACKGROUND: Clinical utility of irrigation-tip ablation catheters for cavo-tricuspid isthmus (CTI) ablation is established. Recently, new-generation enhanced-cooling irrigation-tip catheters were introduced into clinical use. This study compared the performance of different types of novel irrigation-tip catheters in CTI ablation. METHODS: One hundred patients undergoing CTI ablation with novel irrigated-tip catheters were included. Ablation was performed with a power output of 30-35W using either 4-mm flexible tip catheters [FlexAbility (FAs) St...
November 24, 2017: Journal of Cardiology
https://www.readbyqxmd.com/read/29080014/-available-transvenous-occluder-designs-and-implantation-techniques
#7
REVIEW
P Sick, T Lewalter
In this article, most of the present or available in the near future left atrial appendage (LAA) occlusion devices are discussed in terms of structure of the devices and principle technique for implantation. Thus, the Watchman™ device from Boston, the Amulet™ device from Abbot, the Lambre™ device from Lifetech, the Occlutech® device from Occlutech®, and the WaveCrest® device from Biosense Webster (former Coherex) are discussed. The systems differ in terms of the concept of occlusion. Several devices consist of only one part (Watchman™ and Occlutech®) that is implanted in the body, ending up in the orifice of the LAA...
December 2017: Herzschrittmachertherapie & Elektrophysiologie
https://www.readbyqxmd.com/read/29079664/characterization-of-gadolinium-contrast-enhancement-of-radiofrequency-ablation-lesions-in-predicting-edema-and-chronic-lesion-size
#8
Elyar Ghafoori, Eugene G Kholmovski, Sam Thomas, Josh Silvernagel, Nathan Angel, Nan Hu, Derek J Dosdall, Rob MacLeod, Ravi Ranjan
BACKGROUND: Magnetic resonance imaging (MRI) has been used to acutely visualize radiofrequency ablation lesions, but its accuracy in predicting chronic lesion size is unknown. The main goal of this study was to characterize different areas of enhancement in late gadolinium enhancement MRI done immediately after ablation to predict acute edema and chronic lesion size. METHODS AND RESULTS: In a canine model (n=10), ventricular radiofrequency lesions were created using ThermoCool SmartTouch (Biosense Webster) catheter...
November 2017: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/29070619/circular-mapping-catheter-entrapment-in-mitral-valve-apparatus-requiring-emergency-surgery-a-rarely-reported-complication-of-pulmonary-vein-isolation-procedure-for-atrial-fibrillation
#9
Muhammad Iftikhar Sabar, Abhay Bajpai, Aziz Momin, Riyaz A Kaba
Lasso catheter (Biosense Webster) is one of the most commonly employed circular mapping catheters during pulmonary vein isolation (PVI) procedure for atrial fibrillation (AF). Although this catheter has greatly facilitated arrhythmia mapping, it can be associated with serious complications. We report a case of a 59-year-old man who underwent PVI procedure for persistent AF. During the procedure, the Lasso catheter inadvertently slipped into the left ventricular cavity and entangled in the mitral valve apparatus...
October 25, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28927960/a-comparison-between-multipolar-mapping-and-conventional-mapping-of-atrial-tachycardias-in-the-context-of-atrial-fibrillation-ablation
#10
Sok-Sithikun Bun, Tahar Delassi, Decebal Gabriel Latcu, Mohammed El Jamili, Anis Ayari, Abdelkarim Errahmouni, Benjamin Berte, Nadir Saoudi
BACKGROUND: Activation mapping can be challenging and time-consuming in patients with multiple atrial tachycardias (ATs). AIMS: To compare multielectrode mapping using a dedicated mapping catheter - PentaRay (Biosense Webster Inc.) - and the conventional technique for mapping ATs in the context of atrial fibrillation (AF) ablation. METHODS: All procedures where PentaRay mapping of AT were used - after or during persistent AF ablation - were analysed...
January 2018: Archives of Cardiovascular Diseases
https://www.readbyqxmd.com/read/28901573/validation-of-a-novel-cartoseg%C3%A2-segmentation-module-software-for-contrast-enhanced-computed-tomography-guided-radiofrequency-ablation-in-patients-with-atrial-fibrillation
#11
Hasan Imanli, Shaun Bhatty, Jean Jeudy, Yousra Ghzally, Kiddy Ume, Rama Vunnam, Refael Itah, Mati Amit, John Duell, Vincent See, Stephen Shorofsky, Timm M Dickfeld
INTRODUCTION: Visualization of left atrial (LA) anatomy using image integration modules has been associated with decreased radiation exposure and improved procedural outcome when used for guidance of pulmonary vein isolation (PVI) in atrial fibrillation (AF) ablation. We evaluated the CARTOSEG™ CT Segmentation Module (Biosense Webster, Inc.) that offers a new CT-specific semiautomatic reconstruction of the atrial endocardium. METHODS: The CARTOSEG™ CT Segmentation Module software was assessed prospectively in 80 patients undergoing AF ablation...
September 13, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28846152/ablation-of-the-vanishing-pvc-facilitated-by-quantitative-morphology-matching-software
#12
Jeffrey P Moak, Kohei Sumihara, Jonathan Swink, Sridhar Hanumanthaiah, Charles I Berul
BACKGROUND: Ablation of cardiac arrhythmias in children and teenagers often necessitates the use of anesthesia, which can suppress ventricular arrhythmias (VAs), making it difficult to map the site of origin using activation time (AT). Pace mapping, a technique employed to assist with VA origin localization, depends on subjective comparison of paced and targeted QRS morphology. We assessed the utility of a quantitative approach to paced QRS to VA morphology matching using the PaSo software (Carto 3, Biosense Webster), to localize the VA site of origin...
August 28, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28836342/single-trans-septal-access-technique-for-left-atrial-intracardiac-echocardiography-to-guide-left-atrial-appendage-closure
#13
Daniel Aguirre, Christian Pincetti, Luis Perez, Carlos Deck, Mario Alfaro, Maria Jesus Vergara, Gabriel Maluenda
OBJECTIVE: This registry aimed to describe the safety and feasibility of a single trans-septal (TS) access technique for left intracardiac echocardiography (ICE) guidance of left-atrial appendage (LAA) closure procedure. BACKGROUND: LAA closure is currently accepted as an alternative to oral anticoagulation (OAC) in patients with non-valvular atrial fibrillation (NVAF) who are at high-risk for bleeding. Currently, LAA closure procedure is typically performed under trans-esophageal echocardiogram (TEE) guidance...
August 24, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28706589/catheter-ablation-of-atrial-fibrillation-facilitated-by-preprocedural-three-dimensional-transesophageal-echocardiography-long-term-outcome
#14
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/28318819/slow-pathway-radiofrequency-ablation-using-magnetic-navigation-a-description-of-technique-and-retrospective-case-analysis
#15
Abhishek Bhaskaran, Maha Albarri, Neil Ross, Sara Al Raisi, Rahul Samanta, 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
#16
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...
June 2017: Herzschrittmachertherapie & Elektrophysiologie
https://www.readbyqxmd.com/read/28151545/healthcare-utilization-and-quality-of-life-improvement-after-ablation-for-paroxysmal-af-in-younger-and-older-patients
#17
MULTICENTER STUDY
Angelo B Biviano, Tina D Hunter, Gopi Dandamudi, Robert S Fishel, Brett Gidney, Bengt Herweg, Saumil R Oza, Anshul Mahendra Patel, Huijian Wang, Scott J Pollak
BACKGROUND: Atrial fibrillation (AF) prevalence increases significantly with age. Little is known about the effect of AF ablation on quality of life and healthcare utilization in the elderly. The objective of this study was to quantify the healthcare utilization and quality of life benefits of catheter ablation for AF, for patients ≥65 years compared to patients <65 years. METHODS: Two multicenter U.S. registry studies enrolled patients with paroxysmal AF. Baseline characteristics and acute outcomes were collected for 736 patients receiving catheter ablation with the Navistar® ThermoCool® SF Catheter (Biosense Webster, Inc...
April 2017: Pacing and Clinical Electrophysiology: PACE
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/27815807/in-situ-sensor-advancements-for-osteoporosis-prevention-diagnosis-and-treatment
#19
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...
December 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
#20
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
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