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Left Atrial Appendage

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https://www.readbyqxmd.com/read/28534025/atrial-fibrillation-dynamics-and-ionic-block-effects-in-six-heterogeneous-human-3d-virtual-atria-with-distinct-repolarization-dynamics
#1
Carlos Sánchez, Alfonso Bueno-Orovio, Esther Pueyo, Blanca Rodríguez
Atrial fibrillation (AF) usually manifests as reentrant circuits propagating through the whole atria creating chaotic activation patterns. Little is yet known about how differences in electrophysiological and ionic properties between patients modulate reentrant patterns in AF. The goal of this study is to quantify how variability in action potential duration (APD) at different stages of repolarization determines AF dynamics and their modulation by ionic block using a set of virtual whole-atria human models...
2017: Frontiers in Bioengineering and Biotechnology
https://www.readbyqxmd.com/read/28525549/the-change-in-circulating-galectin-3-predicts-absence-of-atrial-fibrillation-after-thoracoscopic-surgical-ablation
#2
Wouter R Berger, Benoît Jagu, Nicoline W E van den Berg, Dean R P P Chan Pin Yin, Jan P van Straalen, Onno J de Boer, Antoine H G Driessen, Jolien Neefs, Sébastien P J Krul, WimJan P van Boven, Allard C van der Wal, Joris R de Groot
Aims: Galectin-3 (Gal-3) is an important mediator of cardiac fibrosis, particularly in heart failure. Increased Gal-3 concentration (Gal-3), associated with increased risk of developing atrial fibrillation (AF), may reflect atrial fibrotic remodelling underlying AF progression. We aimed to investigate whether the change in serum Gal-3 reflects alterations of the arrhythmogenic atrial substrate following thoracoscopic AF surgery, and predicts absence of AF. Methods and results: Consecutive patients undergoing thoracoscopic AF surgery were included...
May 19, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28522304/left-atrial-appendage-occlusion-with-the-lambre-device-initial-experience
#3
Ignacio Cruz-González, Xavier Freixa, José Antonio Fernández-Díaz, José Carlos Moreno-Samos, Victoria Martín-Yuste, Javier Goicolea
No abstract text is available yet for this article.
May 15, 2017: Revista Española de Cardiología
https://www.readbyqxmd.com/read/28515740/left-atrial-appendage-occlusion-procedures
#4
EDITORIAL
Krzysztof Bartuś
No abstract text is available yet for this article.
March 2017: Kardiochirurgia i Torakochirurgia Polska, Polish Journal of Cardio-Thoracic Surgery
https://www.readbyqxmd.com/read/28506939/printed-mdct-3d-models-for-prediction-of-left-atrial-appendage-laa-occluder-device-size-a-feasibility-study
#5
Orly Goitein, Noam Fink, Victor Guetta, Roy Beinart, Yafim Brodov, Eli Konen, David Goitein, Elio Di Segni, Avishay Grupper, Michael Glikson
AIMS: Trans-esophageal echocardiography (TEE) and MDCT currently serve as imaging modalities for left atrial appendage (LAA) occlusion pre-procedural planning. We assessed the feasibility of multi-detector CT (MDCT) based models to predict the correct size of device for LAA occlusion procedures. METHODS AND RESULTS: Patients planned for LAA occlusion underwent MDCT before implantation, which was used for creating and printing 3D LAA models. Three cardiologists evaluated the 3D models and predicted the correct size of the device by manual manipulation, these predictions were compared with the actual device implanted during the procedure...
May 16, 2017: EuroIntervention
https://www.readbyqxmd.com/read/28504238/united-kingdom-coronary-and-structural-heart-interventions-from-2010-to-2015
#6
Peter F Ludman, Mark A de Belder, Simon Redwood, Adrian Banning
In the United Kingdom, a clinical data set is completed for every patient undergoing coronary intervention and certain structural interventions, and sent to central servers in the National Institute for Cardiovascular Outcomes Research (NICOR) on behalf of the British Cardiovascular Intervention Society (BCIS). These data are linked to the national mortality register. In addition, data are obtained about the structure of healthcare provision using an annual survey. Analyses of these data are provided for different audiences in several formats...
May 15, 2017: EuroIntervention
https://www.readbyqxmd.com/read/28504234/spain-coronary-and-structural-heart-interventions-from-2010-to-2015
#7
Bruno García Del Blanco, Pilar Jiménez Quevedo, José D Diaz, Felipe Hernández, José Ramón Rumoroso, Manel Sabaté, José Maria de la Torre Hernandez, Ana Serrador, Armando Pérez de Prado, Javier Goicolea, Ramiro Trillo, Manolo Pan
Since 1990 The Spanish Society of Cardiology Working Group on Cardiac Catheterization and Interventional Cardiology has presented a yearly report on the data collected in the National Registry, with online support since 2010. The Steering Committee has analysed all data provided voluntarily by institutions, which consisted of a total of anywhere between 105 and 113 hospitals. Medical care was provided to a population of 46.8 million inhabitants in 2015. During this period, diagnostic procedures increased progressively from 2010, reaching a maximum of 145,836 in 2015, 86% (125,484) corresponding to coronary angiograms...
May 15, 2017: EuroIntervention
https://www.readbyqxmd.com/read/28504231/poland-coronary-and-structural-heart-interventions-from-2010-to-2015
#8
Jacek Legutko, Zbigniew Siudak, Radosław Parma, Andrzej Ochała, Dariusz Dudek
For the last five years, invasive cardiology in Poland has developed extensively. Currently, 98% of the 161 Polish cathlabs operate in 24/7 mode, 37 of them supported by cardiac surgery departments on-site. A certification curriculum for interventional cardiology operators is supported by dedicated workshops and scientific meetings during national conferences. The rise in the number of coronary angiographies and PCIs was paralleled by an increased use of drug-eluting stents, bioresorbable vascular scaffolds and physiologic assessment of coronary arteries...
May 15, 2017: EuroIntervention
https://www.readbyqxmd.com/read/28504228/italy-coronary-and-structural-heart-interventions-from-2010-to-2015
#9
Sergio Berti, Ferdinando Varbella, Alfredo Marchese, Luigi Emilio Pastormerlo, Giuseppe Musumeci
The aim of this report is to analyse trends in Italian cathlab activity between 2010 and 2015. Data were obtained from the national database of the Italian Society of Interventional Cardiology (GISE), which includes 97% of Italian cardiac catheterisation laboratories. The number of percutaneous coronary interventions (PCI) has remained relatively stable in the past five years. We have observed a significant increase in the number of primary PCI (pPCI) from 471.5 to 557.5 per million inhabitants with a consequent reduction of rescue primary PCI/fibrinolysis...
May 15, 2017: EuroIntervention
https://www.readbyqxmd.com/read/28500479/-catheter-ablation-of-persistent-atrial-fibrillation-where-do-we-go
#10
C Lemeš, K-H Kuck, S Mathew
Despite the very promising initial results of clinical studies, catheter ablation of persistent atrial fibrillation (AF) remains a challenge in modern electrophysiology. On the basis of the hypothesized pathophysiological mechanisms, a variety of ablation strategies have been developed over the course of time. The current ablation strategies range from pulmonary vein isolation (PVI) alone as first-line therapy, through ablation of multiple linear lesions, ablation of complex fractionated atrial electrograms (CFAE), rotor ablation, isolation of fibrotic and scar tissue up to isolation of the left atrial appendage (LAA); however, it is unclear even to the present day whether these complex and time-consuming strategies actually improve the success rate of ablation therapy...
May 12, 2017: Herz
https://www.readbyqxmd.com/read/28496929/management-of-patients-with-atrial-fibrillation-focus-on-treatment-options
#11
REVIEW
Pawel Matusik, Jacek Lelakowski, Barbara Malecka, Jacek Bednarek, Remigiusz Noworolski
Atrial fibrillation (AF) is leading cardiac arrhythmia with important clinical implications. Its diagnosis is usually made on the basis on 12-lead ECG or 24-hour Holter monitoring. More and more clinical evidence supports diagnostic use of cardiac event recorders and cardiovascular implantable electronic devices (CIED). Treatment options in patients with atrial fibrillation are extensive and are based on chosen rhythm and/or rate control strategy. The use and selected contraindications to AF related pharmacotherapy, including anticoagulants are shown...
October 2016: Journal of Atrial Fibrillation
https://www.readbyqxmd.com/read/28496927/e-ea-for-the-prediction-of-left-atrial-appendage-thrombi-in-patients-with-atrial-fibrillation-and-severe-mitral-stenosis
#12
Atoosheh Rohani, Hoorak Poorzand, Mohammad R Arefifar
Atrial fibrillation (AF), left atrial appendage thrombi (LAAT) and subsequent embolic stroke are the most frequent complications of mitral stenosis .E/Ea is used traditionally for the assessment of left atrium pressure, and besides AF and dilated LA size which promotes stasis of blood in LA, high LA pressure also play a role to clot formation in LA .The receiver operator characteristics (ROC) curve point-coordinates identified an E:e' value of ≥ 36.5to have 57.14% sensitivity and 90.91% specificity for LAAT;We find this ratio relatively specific for prediction of LAAT, independent of MVA and LA volume, however it needs to be externally validated...
October 2016: Journal of Atrial Fibrillation
https://www.readbyqxmd.com/read/28495432/changes-in-coagulation-and-platelet-activation-markers-following-transcatheter-left-atrial-appendage-closure
#13
Josep Rodés-Cabau, Gilles O'Hara, Jean-Michel Paradis, Mathieu Bernier, Tania Rodriguez-Gabella, Ander Regueiro, Kim O'Connor, Jonathan Beaudoin, Rishi Puri, Mélanie Côté, Jean Champagne
The recommendations for antithrombotic treatment after left atrial appendage closure (LAAC) remain empirical, and no data exist on the changes in hemostatic markers associated with LACC. The objective of the present study is to determine the presence, degree, and timing of changes in the markers of platelet and coagulation activation after LAAC. Forty-three patients (mean age 76 ± 9 years, 23 men) with atrial fibrillation who underwent successful LACC with the Watchman (n = 27) or Amplatzer Cardiac Plug (n = 16) devices were included in the study...
April 12, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28495117/first-experience-with-the-watchman-flx-occluder-for-percutaneous-left-atrial-appendage-closure
#14
Julia Seeger, Ralf Birkemeyer, Wolfgang Rottbauer, Jochen Wöhrle
BACKGROUND: We aimed to evaluate efficacy and safety of left atrial appendage (LAA) closure with the new Watchman FLX and analyze procedural features in a consecutive series of high risk non-valvular atrial fibrillation patients. METHODS AND RESULTS: Twelve consecutive non-valvular atrial fibrillation patients (age 76.6±7.8years) at high risk for stroke (CHA2DS2-VASc-Score 5.5±0.9) and bleeding (HAS-BLED-Score 3.8±0.9), received LAA closure with the Watchman FLX...
April 29, 2017: Cardiovascular Revascularization Medicine: Including Molecular Interventions
https://www.readbyqxmd.com/read/28491759/termination-of-anticoagulation-therapy-at-45-days-after-concomitant-atrial-fibrillation-catheter-ablation-and-left-atrial-appendage-occlusion-resulting-in-device-related-thrombosis-and-stroke
#15
https://www.readbyqxmd.com/read/28491735/air-emboli-during-the-procedure-of-transcatheter-left-atrial-appendage-closure
#16
Shuang Li, Wei Chen, Shuang Li, Dongdong Zhao, Kai Tang, Yat-Yam Lam, Yawei Xu
No abstract text is available yet for this article.
November 2016: HeartRhythm Case Reports
https://www.readbyqxmd.com/read/28485276/left-atrial-appendage-occlusion-versus-standard-medical-care-in-patients-with-atrial-fibrillation-and-intracerebral-hemorrhage-a-propensity-score-matched-follow-up-study
#17
Jens Erik Nielsen-Kudsk, Søren Paaske Johnsen, Per Wester, Dorte Damgaard, Juhani Airaksinen, Juha Lund, Ole De Backer, Sami Pakarinen, Jacob Odenstedt, Saila Vikman, Magnus Settergren, Ole Kongstad, Mårten Rosenqvist, Derk W Krieger
AIMS: The aim of this study was to investigate the prognosis in patients with atrial fibrillation (AF) and intracerebral hemorrhage (ICH) having a left atrial appendage occlusion (LAAO) versus patients receiving standard medical therapy. METHODS AND RESULTS: A total of 151 patients from the Nordic countries with AF and previous ICH who underwent LAAO using the Amplatzer Cardiac Plug or the Amplatzer Amulet were compared to a propensity score matched group of 151 patients receiving standard medical therapy...
May 9, 2017: EuroIntervention
https://www.readbyqxmd.com/read/28477098/predictors-of-thrombus-formation-after-percutaneous-left-atrial-appendage-closure-using-the-watchman-device
#18
Hidehiro Kaneko, Michael Neuss, Jens Weissenborn, Christian Butter
Percutaneous left atrial appendage (LAA) closure using the WATCHMAN device is a novel option for prevention of stroke associated with atrial fibrillation. However, device-related thrombus (DRT) formation is a concern after WATCHMAN implantation and the predictors of DRT still remain unclear. We aimed to clarify the predictors of DRT after WATCHMAN implantation by analyzing 78 patients (50 males, 72 ± 8 years, average CHA2DS2-VASc score of 4.3 + 1.8) who had undergone WATCHMAN implantation. WATCHMAN was successfully implanted in all patients and four (5%) developed DRT...
May 5, 2017: Heart and Vessels
https://www.readbyqxmd.com/read/28475580/neural-substrate-of-posterior-left-atrium-a-novel-modulation-for-inducibility-and-remodeling-of-atrial-fibrillation-in-canine
#19
Mu Qin, Li Li, Xu Liu, Tao Liu, Shao Bo Shi
BACKGROUND: The neural mechanism of posterior left atrium (PLA) for genesis of atrial fibrillation has not been completely elucidated. We sought to assess the contribution of PLA denervation on atrial fibrillation (AF) inducibility and atrial remodeling. METHODS AND RESULTS: After left thoracotomy in anesthetized dogs (n = 32), electrode catheters were attached to the PLA, left atrial roof, left pulmonary vein and left atrial appendage. Experiment 1 (n = 16): Vagal stimulation (VS group, n = 8) led to more pronounced ERP shortening in PLA than in other sites (CTL:71±7 ms vs VS: 52±6 ms, P<0...
2017: PloS One
https://www.readbyqxmd.com/read/28472274/suggestions-for-clinical-studies-about-percutaneous-left-atrial-appendage-occlusion
#20
Claudia Stöllberger, Birke Schneider
No abstract text is available yet for this article.
May 2, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
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