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Catheter Mapping

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https://www.readbyqxmd.com/read/29138142/catheter-ablation-of-idiopathic-left-posterior-fascicular-ventricular-tachycardia-predicting-the-site-of-origin-via-mapping-and-electrocardiography
#1
Wei Ma, Fengmin Lu, Michael Shehata, Xunzhang Wang, Fan Zhang, Bingwei Chen, Dongyan Wu, Le He, Shan Sun, Aijuan Cheng, Jun Ding, Hongliang Cong, Jing Xu
BACKGROUND: We report the 12-lead ECG morphology of left posterior fascicular ventricular tachycardia (LPF-VT) and the relationship between His-ventricular (HV) interval and site of origin in LPF-VT. METHODS AND RESULTS: We studied 41 patients who underwent successful catheter ablation of LPF-VT with HV interval >0 ms (n=8; proximal-LPF group), HV interval 0 to -15 ms (n=15; middle-LPF group), and HV interval <-15 ms (n=18; distal-LPF group). The earliest mapped presystolic potential (PP)-QRS interval was 34...
November 2017: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/29134434/fluoroscopy-free-af-ablation-using-transesophageal-echocardiography-and-electroanatomical-mapping-technology
#2
Benjamin O'Brien, Damian C Balmforth, Ross J Hunter, Richard J Schilling
PURPOSE: Guidelines recommend that radiation exposure during AF catheter ablation procedures should be 'as low as reasonably achievable' (ALARA), particularly since many patients may have multiple procedures. Consequently, avoiding radiation exposure altogether must, if safe to do so, be the ultimate goal. The primary objective was to determine the feasibility and efficacy of fluoroscopy-free AF ablation compared to the fluoroscopy-assisted procedure. METHODS: Patients underwent AF ablation using commercially available technology with no routine pre-procedural imaging...
November 14, 2017: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
https://www.readbyqxmd.com/read/29133182/a-novel-method-for-localization-and-ablation-of-conduction-gaps-after-wide-antral-circumferential-ablation-of-pulmonary-veins
#3
Raoul Bacquelin, Raphaël P Martins, Nathalie Behar, Vincent Galand, Baptiste Polin, Jonathan Lacaze, Frédéric Sebag, Christophe Leclercq, Jean-Claude Daubert, Philippe Mabo, Dominique Pavin
BACKGROUND: Atrial fibrillation ablation is often performed by achieving pulmonary vein isolation using the "wide antral circumferential ablation" (WACA) technique, but many pulmonary veins remain connected because of conduction gaps in the ablation line. AIM: To analyse the efficacy of a novel technique based on pacing manoeuvres to detect gaps in an initial WACA lesion. METHODS: Patients referred for radiofrequency atrial fibrillation ablation were enrolled prospectively...
November 10, 2017: Archives of Cardiovascular Diseases
https://www.readbyqxmd.com/read/29111398/multi-slice-ct-msct-imaging-in-pre-trans-catheter-aortic-valve-implantation-tavi-screening-how-to-perform-and-how-to-interpret
#4
REVIEW
George Latsios, Themistoklis N Spyridopoulos, Konstantinos Toutouzas, Andreas Synetos, George Trantalis, Konstantinos Stathogiannis, Vassiliki Penesopoulou, George Oikonomou, Elias Brountzos, Dimitrios Tousoulis
Aortic valve stenosis (AS) is the commonest valvular heart disease among elderly. Trans-catheter aortic valve implantation (TAVI) has become an established and effective alternative therapeutical procedure for inoperable and high risk patients with symptomatic AS. The procedural success is greatly dependent on a thorough pre- TAVI imaging screening. This requires a comprehensive and multi-modality approach, in which multi-slice computed tomography (MSCT) is the cornerstone in the selection of eligible patients, in choosing the appropriate prosthesis and its size, as well as in mapping the safest access route for the intervention...
October 27, 2017: Hellenic Journal of Cardiology: HJC, Hellēnikē Kardiologikē Epitheōrēsē
https://www.readbyqxmd.com/read/29100747/box-isolation-of-fibrotic-areas-a-substrate-modification-approach-in-atrial-fibrillation-patients
#5
REVIEW
Fabian Moser, Doreen Schreiber, Andreas Rieger, Monica Trofin, Christian Pönisch, Hans Kottkamp
In the last years, atrial fibrosis was shown to be an independent predictor of procedural failure in patients with paroxysmal and persistent atrial fibrillation. Ablation strategies have been developed to improve the outcome of catheter ablation by targeting detected areas of fibrosis, based either on endocardial voltage mapping or cardiac magnetic resonance. Box isolation of fibrotic areas (BIFA) is a new and promising patient-tailored ablation strategy for atrial fibrillation patients targeting substantial fibrotic areas by circumferential isolation of left atrial fibrosis...
October 31, 2017: Portuguese Journal of Cardiology: An Official Journal of the Portuguese Society of Cardiology
https://www.readbyqxmd.com/read/29094471/antifibrillatory-effects-of-renal-denervation-on-ventricular-fibrillation-in-a-canine-model-of-pacing-induced-heart-failure
#6
Qingzhi Luo, Qi Jin, Ning Zhang, Shangwei Huang, Yanxin Han, Changjian Lin, Tianyou Ling, Kang Chen, Wenqi Pan, Liqun Wu
This study investigated the effects of renal denervation (RDN) on vulnerability to ventricular fibrillation (VF) and ventricular electrical properties in a canine model of pacing-induced heart failure (HF). Eighteen beagles were divided into the following three groups: control (n = 6), HF (n = 6) and HF+RDN (n = 6). HF was induced by rapid right ventricular pacing. RDN was performed simultaneously with the pacemaker implantation in the HF+RDN group. A 64-unipolar basket catheter was used to perform global endocardial mapping of the left ventricle...
November 2, 2017: Experimental Physiology
https://www.readbyqxmd.com/read/29092036/antegrade-transseptal-approach-for-left-ventricular-tachyarrhythmia-in-patients-with-previous-mitraclip-implantation
#7
Kentaro Hayashi, Christian-H Heeger, Shibu Mathew, Tilman Maurer, Christine Lemes, Johannes Riedl, Bruno Reißmann, Christian Frerker, Stephan Geidel, Michael Schmoeckel, Ardan M Saguner, Francesco Santoro, Roland Richard Tilz, Andreas Metzner, Karl-Heinz Kuck, Feifan Ouyang
Aims: Antegrade-transseptal approach to treat left ventricular tachyarrhythmia (LVT) is useful and widespread. Meanwhile, Mitraclip has been recently introduced as an alternative to mitral valve surgery for severe mitral regurgitation, usually coexisting with ventricular arrhythmias. However, data on the antegrade approach for mapping and ablating LVT in these patients are insufficient. We evaluated the feasibility and clinical impact of the antegrade approach for LVT after Mitraclip implantation...
October 30, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/29081399/re-visiting-anatomical-macroreentrant-tachycardia-after-atrial-fibrillation-ablation-using-ultra-high-resolution-mapping-implications-for-ablation
#8
Masateru Takigawa, Nicolas Derval, Antonio Frontera, Ruairidh Martin, Seigo Yamashita, Ghassen Cheniti, Konstantinos Vlachos, Nathaniel Thompson, Takeshi Kitamura, Michel Wolf, Gregoire Massoullie, Clair Martin, Nora Al-Jefairi, Sana Amraoui, Josselin Duchateau, Nicolas Klotz, Thomas Pambrun, Arnaud Denis, Frederic Sacher, Hubert Cochet, Hocini Meleze, Michel Haissaguierre, Pierre Jais
BACKGROUND: Anatomical macroreentrant atrial tachycardias (MATs) are conventionally reported to depend on the cavotricuspid isthmus (CTI), the mitral isthmus (MI), or the left atrial roof, and are commonly seen following catheter ablation (CA) for atrial fibrillation (AF). OBJECTIVES: To define the precise circuits of anatomical MAT with ultra-high resolution mapping. METHODS: In 57 patients (mean age, 62 years; 10 female) who developed at least one anatomical MAT, we analyzed 88 MAT circuits including 16 peri-tricuspid, 42 peri-mitral, and 30 roof-dependent circuits, using high-density mapping and entrainment...
October 25, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/29081135/-study-on-the-three-dimensional-mapping-to-reduce-the-x-ray-exposure-dose-of-interventional-doctors-in-radiofrequency-catheter-ablation-of-atrioventricular-nodal-reentry-tachycardia
#9
R Wang, N Zhang, R H Wang, J Gao, Z Q Zhao, Y P Jia, M Sun
Objective: To explore the advantage of radiofrequency catheter ablation under the three-dimensional mapping in the treatment of atrioventricular nodal reentrant tachycardia (AVNRT) in reducing the X-ray exposure dose of interventional doctors. Methods: 79 patients with AVNRT, in the first hospital of Shanxi Medical University from January 2015 to June 2016, performed to do radiofrequency catheter ablation treatment were selected, and according to the random number method were divided into two-dimensional mapping group and three-dimensional mapping group...
August 20, 2017: Chinese Journal of Industrial Hygiene and Occupational Diseases
https://www.readbyqxmd.com/read/29072996/wide-qrs-tachycardia-in-a-patient-with-pre-excitation-what-are-the-pathways-involved-pacing-manoeuvres-to-characterize-a-unique-pathway
#10
Krishna Kumar Mohanan Nair, Anees Thajudeen, Narayanan Namboodiri, Ajitkumar Valaparambil
A 30year old patient presented to us with recurrent episodes of palpitation and documented tachycardia. In all his presentations a wide QRS tachycardia was recorded. The baseline ECG showed pre excitation. The 12 lead ECG of the tachycardia and the baseline ECG is shown in Fig. 1A. During EP study the patient had baseline pre excitation and the HV interval was 16 ms. A duo-decapolar halo (HL) catheter was used to map right atrium and a decapolar coronary sinus (CS) catheter was used to map coronary sinus...
March 2017: Indian Pacing and Electrophysiology Journal
https://www.readbyqxmd.com/read/29071756/novel-electrophysiological-criteria-for-septal-ventricular-outflow-tract-tachycardias-requiring-a-sequential-bilateral-ablation
#11
Chin-Yu Lin, Fa-Po Chung, Yenn-Jiang Lin, Shih-Lin Chang, Li-Wei Lo, Yu-Feng Hu, Jo-Nan Liao, Ta-Chuan Tuan, Tze-Fan Chao, Yao-Ting Chang, Yun-Yu Chen, Abigail Louise D Te, Shinya Yamada, Ling Kuo, Jennifer Jeanne B Vicera, Ting-Yung Chang, Hoang Quang Minh, Simon Salim, Ting-Chung Huang, Shih-Ann Chen
BACKGROUND: Septal ventricular outflow tract ventricular arrhythmias (OT-VAs) are defined as septal origin VAs from the right ventricular or left ventricular OT. Patients with septal OT-VAs may require a sequential bilateral OT ablation. This study aimed to evaluate the electrophysiological characteristics and ablation outcome in patients with septal OT-VAs. METHODS: We retrospectively analyzed the electrocardiography and electrophysiological parameters in 96 patients (mean age 49 ± 15 years, 49 male) undergoing bilateral activation mapping before catheter ablation of idiopathic septal OT-VAs...
October 26, 2017: Journal of Cardiovascular 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
#12
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/29067915/pseudo-cryomapping-for-ablation-of-atrioventricular-nodal-reentry-tachycardia-a-single-center-north-american-experience
#13
Vaibhav K Moondra, Mark L Greenberg, Barbara R Gerling, Peter T Holzberger, Steven N Weindling, Rajbir S Sangha
BACKGROUND: Most literature for cryoablation of atrioventricular nodal reentry tachycardia (AVNRT) is based on -30 degree celsius cryomapping with 4 & 6 mm distal electrode catheters. The cryomapping mode is not available on the 6 mm cryocatheter in the United States. We describe a technique for 'pseudo' mapping at -80° using a 6 mm cryocatheter and report on short and long term outcomes. METHODS: A retrospective analysis of all index cases (n = 253) of cryoablation of AVNRT at a single North American institution during the period of 2003-2010 was performed...
July 2017: Indian Pacing and Electrophysiology Journal
https://www.readbyqxmd.com/read/29064134/reducing-radiation-exposure-during-procedures-performed-in-the-electrophysiology-laboratory
#14
Bernard Thibault, Laurent Macle, Blandine Mondésert, Marc Dubuc, Azadeh Shohoudi, Katia Dyrda, Peter G Guerra, Léna Rivard, Denis Roy, Mario Talajic, Paul Khairy
INTRODUCTION: Expert societies recently published strong recommendations to reduce the exposure of patients and staff to ionizing radiation (IR) during interventional and electrophysiology (EP) procedures. However, adherence to these guidelines remains difficult and the impact of implementing such recommendations is poorly characterized. METHODS AND RESULTS: We conducted a single-center cohort study to quantify radiation exposure over time in 3 EP laboratories at the Montreal Heart Institute during 5,546 consecutive procedures from 2012 to 2015 by 11 primary operators...
October 24, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29056543/utility-of-the-ultra-high-resolution-3-dimensional-mapping-catheter-for-isolated-pulmonary-vein-reentrant-tachycardia
#15
Yuichi Hori, Shiro Nakahara, Reiko Fukuda, Isao Taguchi
No abstract text is available yet for this article.
October 19, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/29050870/brugada-syndrome-is-associated-with-scar-and-endocardial-involvement-insights-from-high-density-mapping-with-the-rhythmia%C3%A2-mapping-system
#16
Rui Providência, Pedro Carmo, Francisco Moscoso Costa, Diogo Cavaco, Francisco Morgado, Mauricio Scanavacca, Pedro Adragão
The authors report the first catheter ablation of Brugada syndrome in the literature using the Rhythmia™ mapping system. Learning points include: (1) low voltage areas can be documented while mapping in some individuals, suggesting that Brugada syndrome may not be a pure ion channel disorder; (2) typical long fractionated potentials can also be identified in the endocardium, supporting the need to map the endocardium in all Brugada patients requiring ablation; (3) disappearance of the typical coved pattern following ablation does not necessarily predict cure, as the patient we present experienced ventricular fibrillation recurrence a few months later...
October 2017: Portuguese Journal of Cardiology: An Official Journal of the Portuguese Society of Cardiology
https://www.readbyqxmd.com/read/29042091/effects-of-renal-denervation-on-coronary-flow-reserve-and-forearm-dilation-capacity-in-patients-with-treatment-resistant-hypertension-a-randomized-double-blinded-sham-controlled-clinical-trial
#17
Morten Engholm, Jannik B Bertelsen, Ole N Mathiassen, Hans E Bøtker, Henrik Vase, Christian D Peters, Jesper N Bech, Niels H Buus, Anne P Schroeder, Hans Rickers, Klavs W Hansen, Per L Poulsen, Anne Kaltoft, Kent L Christensen
BACKGROUND: Microvascular impairment is well documented in hypertension. We investigated the effect of renal sympathetic denervation (RDN) on cardiac and peripheral microvasculature in patients with treatment-resistant essential hypertension (TRH). METHODS: A randomized, single centre, double-blinded, sham-controlled clinical trial. Fifty-eight patients with TRH (ambulatory systolic BP (ASBP) ≥ 145mmHg) despite stable treatment were randomized to RDN or SHAM. RDN was performed with the unipolar Medtronic Flex catheter...
October 1, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/29037801/validation-of-noninvasive-blood-pressure-equipment-which-peripheral-artery-is-best-for-comparison-studies-in-dogs
#18
Anderson F da Cunha, Sara J Ramos, Michelle Domingues, Amanda Shelby, Hugues Beaufrère, Rhett Stout, Mark J Acierno
OBJECTIVES: 1) To determine which peripheral artery commonly used for invasive arterial blood pressure (IBP) monitoring yields the least bias when compared with noninvasive blood pressure (NIBP) values obtained at the antebrachium of the dog, and 2) to identify and describe differences in systolic (SAP), mean (MAP) and diastolic arterial pressures (DAP) among different anatomical locations. STUDY DESIGN: Prospective experimental study. ANIMALS: Twenty adult hound dogs weighing 24...
August 3, 2017: Veterinary Anaesthesia and Analgesia
https://www.readbyqxmd.com/read/29027182/preoperative-management-of-arteriovenous-fistula-avf-for-hemodialysis
#19
Gaetano Alfano, Francesco Fontana, Mario Iannaccone, Patrizia Noussan, Gianni Cappelli
Native arteriovenous fistula (AVF) is the favorite access for hemodialysis (HD). The National Kidney Foundation's Kidney Disease Outcomes Quality Initiative (KDOQI) recommends its creation in most patients with renal failure. Unfortunately, intensive efforts to promote native AVF in patients with marginal vessels have increased the rate of primary fistula failure. A non-functioning fistula prompts the use of central venous catheter (CVC) that, unlike AVF, has been associated with an increased risk of morbidity and mortality among patients receiving HD...
October 11, 2017: Journal of Vascular Access
https://www.readbyqxmd.com/read/29024212/prevalence-and-predictive-factors-of-left-atrial-tachycardia-occurring-after-second-generation-cryoballoon-ablation-of-atrial-fibrillation
#20
Alexis Hermida, Maciej Kubala, Sarah Traullé, Otilia Buiciuc, Serge Quenum, Jean-Sylvain Hermida
INTRODUCTION: Assess the prevalence and predictors of Left Atrial Tachycardia (LAT) after cryoballoon ablation of pulmonary veins. METHODS AND RESULTS: Patients who underwent catheter ablation of pulmonary veins with a second-generation cryoballoon for symptomatic paroxysmal (151/270, 56%) or persistent (119/270, 44%) atrial fibrillation were entered in a single-centre prospective registry. Patients who experienced post-cryoballoon LAT (pcryo-LAT) were selected on the basis of 12-lead ECG characteristics...
October 11, 2017: Journal of Cardiovascular Electrophysiology
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