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Left Atrial Appendage

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https://www.readbyqxmd.com/read/28938531/premature-senescence-of-cardiac-fibroblasts-and-atrial-fibrosis-in-patients-with-atrial-fibrillation
#1
Jun Xie, Yuhan Chen, Chuanxian Hu, Quanhua Pan, Bingjian Wang, Xueling Li, Jin Geng, Biao Xu
Premature senescence is associated with atrial fibrosis and has an antifibrotic effect in mice. However, the role of senescence in atrial fibrillation (AF) remains unclear. Here, we investigated the association of premature senescence with fibrosis and also determined the role of senescence in the recurrence of AF after surgery ablation. Western blot, Sirius red staining, SA-β-gal staining and immunohistochemistry were performed to detect the degree of atrial fibrosis ,the expression of TGF-β and collagens, and also the senescence markers in 72 tissue specimens of left atrial appendage in this study...
August 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/28937581/thrombosis-on-a-left-atrial-appendage-occluder-device-the-double-edged-sword-of-stroke-prevention-strategies-in-atrial-fibrillation
#2
Giuseppe Ciconte, Manuel Conti, Mario Baldi, Massimo Saviano, Gabriele Vicedomini, Carlo Pappone
: A huge thrombus, developing after percutaneous left atrial appendage occlusion, has been successfully treated with dabigatran and aspirin as combination therapy.Although novel oral anticoagulants alone may be effective in thrombus dissolution, the association of an antiplatelet drug may safely enhance this process.
September 20, 2017: Journal of Cardiovascular Medicine
https://www.readbyqxmd.com/read/28937420/unexpected-left-atrial-thrombus-after-aortic-valve-replacement-and-left-atrial-ligation-with-atriclip-device-a-case-report
#3
Kinjal M Patel, Michael Rosenbloom, Muhammad Raza, Sean Stevens, Jonathan Rost, Ahmed Awad, Ronak G Desai
We report the unexpected transesophageal echocardiography (TEE) finding of a left atrial (LA) thrombus near the end of cardiopulmonary bypass and after deployment of an AtriClip (Atricure, Inc, Westchester, OH) in an 84-year-old man with atrial fibrillation and aortic stenosis undergoing aortic valve replacement and LA appendage ligation. TEE examination before cardiopulmonary bypass and deployment of the AtriClip had not shown a thrombus in the LA appendage. The heart was rearrested and thrombus was successfully removed through a left atriotomy...
September 20, 2017: A & A Case Reports
https://www.readbyqxmd.com/read/28930824/evaluating-the-morphology-of-the-left-atrial-appendage-by-a-transesophageal-echocardiographic-3-dimensional-printed-model
#4
Hongning Song, Qing Zhou, Lan Zhang, Qing Deng, Yijia Wang, Bo Hu, Tuantuan Tan, Jinling Chen, Yiteng Pan, Fazhi He
The novel 3-dimensional printing (3DP) technique has shown its ability to assist personalized cardiac intervention therapy. This study aimed to determine the feasibility of 3D-printed left atrial appendage (LAA) models based on 3D transesophageal echocardiography (3D TEE) data and their application value in treating LAA occlusions.Eighteen patients with transcatheter LAA occlusion, and preprocedure 3D TEE and cardiac computed tomography were enrolled. 3D TEE volumetric data of the LAA were acquired and postprocessed for 3DP...
September 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28928618/congenital-left-atrial-appendage-aneurysm-atypical-presentation
#5
Mehdi Bamous, Mahdi Aithoussa, Ayoub Abetti, Abdelatif Boulahya
Congenital left atrial appendage aneurysm is a rare condition caused by dysplasia of the atrial muscles. We report a case of a 14-year-old boy, with a 5-month history of cough and in sinus rhythm. Transthoracic echocardiography and computerized tomographic angiography confirmed the aneurysm of the left atrial appendage which was resected through median sternotomy on cardiopulmonary bypass. This case is presented not only for its rarity but also for its atypical clinical presentation.
September 2017: Annals of Pediatric Cardiology
https://www.readbyqxmd.com/read/28928613/clarifying-the-anatomy-and-physiology-of-totally-anomalous-systemic-venous-connection
#6
REVIEW
Saurabh Kumar Gupta, Rajnish Juneja, Robert H Anderson, Gurpreet S Gulati, Velayoudam Devagorou
The description of totally anomalous systemic venous connection is limited to case reports. In this review, we seek to clarify anatomic, physiologic, and hemodynamic aspects of this extremely rare anomaly. We also present findings of two patients in whom connection of all the systemic veins was anomalous. In the first patient, with usual atrial arrangement, all systemic veins, including the coronary sinus, were connected anomalously to the morphologically left atrium. Limited left-to-right shunt across an atrial septal defect provided the only source of blood flow to the lungs...
September 2017: Annals of Pediatric Cardiology
https://www.readbyqxmd.com/read/28924077/perforation-of-the-left-atrial-appendage-caused-by-inadvertent-deployment-of-a-soft-j-tipped-guidewire-during-radiofrequency-hot-balloon-ablation
#7
Hiro Yamasaki, Fumi Yamagami, Takeshi Machino, Kenji Kuroki, Yukio Sekiguchi, Kazutaka Aonuma, Akihiko Nogami
No abstract text is available yet for this article.
September 16, 2017: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/28921386/midterm-outcomes-of-two-staged-hybrid-ablation-of-persistent-and-long-standing-persistent-atrial-fibrillation-using-the-versapolar-epicardial-surgical-device-and-subsequent-catheter-ablation
#8
Petr Budera, Pavel Osmancik, Dalibor Herman, Jana Zdarska, David Talavera, Anna Mala, Radka Prochazkova, Zbynek Straka
PURPOSE: Hybrid ablation of atrial fibrillation (AF) is a promising treatment strategy for patients with non-paroxysmal AF, although, data regarding mid-term outcomes are limited. METHODS: Patients with persistent or long-standing persistent AF were enrolled. Initially, a thoracoscopic, right-sided, epicardial ablation was performed, with a goal of creating a box lesion on the posterior wall of the left atrium; a novel versapolar radiofrequency (RF) catheter was used...
September 18, 2017: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
https://www.readbyqxmd.com/read/28917494/early-dislodgment-and-migration-of-a-left-atrial-appendage-closure-device
#9
Mohamed Sanhoury, Gaetano Fassini, Antonio Dello Russo, Giuseppe Lumia, Antonio Bartorelli
A 68-year-old man underwent pulmonary vein isolation with cryoballoon combined with left atrial appendage closure using a LAmbre device. The device was dislodged and embolized early after implantation with no symptoms, and it was retrieved percutaneously. An early in-hospital check of the device position after implantation is important for early recognition of any possible device-related complication.
August 9, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28905045/left-atrial-appendage-occlusion-in-a-patient-with-hereditary-hemorrhagic-telangiectasia-and-atrial-fibrillation-a-therapeutic-option-worth-considering
#10
Maksymilian Mielczarek, Rafał Gałąska, Piotr Drewla, Dorota Kulawiak-Gałąska, Dariusz Ciećwierz, Marcin Gruchała
No abstract text is available yet for this article.
2017: Arch Med Sci Atheroscler Dis
https://www.readbyqxmd.com/read/28902652/case-image-occurrence-of-atrial-fibrillation-while-isolating-the-left-atrial-appendage-due-to-vasospasm-at-the-sinoatrial-node-artery
#11
Uğur Canpolat, Banu Evranos, Hikmet Yorgun, Tuncay Hazırolan, Kudret Aytemir
No abstract text is available yet for this article.
September 2017: Türk Kardiyoloji Derneği Arşivi: Türk Kardiyoloji Derneğinin Yayın Organıdır
https://www.readbyqxmd.com/read/28898453/echocardiographic-guidance-and-monitoring-of-left-atrial-appendage-closure-with-atriclip-during-open-chest-cardiac-surgery
#12
Rachele Contri, Sara Clivio, Tiziano Torre, Tiziano Cassina
Left atrial appendage (LAA) closure prevents thromboembolic risk and avoids lifelong anticoagulation due to atrial fibrillation (AF). Nowadays, AtriClip, a modern epicardial device approved in June 2010, allows external and safe closure of LAA in patients undergoing cardiac surgery during other open-chest cardiac surgical procedures. Such a surgical approach and its epicardial deployment differentiates LAA closure with AtriClip from percutaneous closure techniques such as Watchman (Boston Scientific, Marlborough, MA, USA), Lariat (SentreHEART Inc...
September 12, 2017: Echocardiography
https://www.readbyqxmd.com/read/28887807/feasibility-of-multiplane-microtransoesophageal-echocardiographic-guidance-in-structural-heart-disease-transcatheter-interventions-in-adults
#13
V J Nijenhuis, A Alipour, N C Wunderlich, B J W M Rensing, G Gijsbers, J M Ten Berg, M J Suttorp, L V A Boersma, J A S van der Heyden, M J Swaans
INTRODUCTION: Structural heart interventions are guided by transoesophageal or intracardiac echocardiography (TEE/ICE). MicroTEE, developed for paediatric purposes, is smaller and therefore less invasive and traumatic, avoiding the need for general anaesthesia. We aimed to show feasibility of procedural guidance by comparing image quality of microTEE with standard TEE and ICE during adult transcatheter interventions, and assess the accuracy in obtaining left atrial appendage (LAA) measurements between the microTEE probe and standard TEE...
September 8, 2017: Netherlands Heart Journal
https://www.readbyqxmd.com/read/28882323/left-atrial-appendage-closure-for-prevention-of-death-stroke-and-bleeding-in-patients-with-nonvalvular-atrial-fibrillation
#14
Steffen Gloekler, Jacqueline Saw, Konstantinos C Koskinas, Caroline Kleinecke, Werner Jung, Fabian Nietlispach, Bernhard Meier
Nonvalvular atrial fibrillation (AF) is the most frequent arrhythmia with a prevalence of 1%-2% in the general population. Its prevalence increases with age and its diagnosis benefits of improvement and simplification of technologies for its detection. Today, AF affects approximately 7% of individuals age>65years and 15%-20% of octogenarians. Due to stasis and activation of coagulation in a fibrillating atrium, patients are at increased risk of thromboembolism, in particular ischemic stroke, with an overall stroke risk of 5% per year...
August 26, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28881765/mitral-isthmus-ablation-using-a-circular-mapping-catheter-positioned-in-the-left-atrial-appendage-as-a-reference-for-conduction-block
#15
Takahiko Nishiyama, Takehiro Kimura, Taishi Fujisawa, Kazuaki Nakajima, Akira Kunitomi, Shin Kashimura, Yoshinori Katsumata, Nobuhiro Nishiyama, Yoshiyasu Aizawa, Keiichi Fukuda, Seiji Takatsuki
BACKGROUND: For perimitral atrial flutter (PMFL) developing after catheter ablation of atrial fibrillation (AF), to create a complete conduction block at the mitral isthmus (MI) is mandatory to terminate it, however, it is still challenging. METHODS: This study consisted of 80 patients (74 male, 61 ± 8.1 years) undergoing MI ablation. After a circular mapping catheter was positioned at the neck of the left atrial appendage (LAA), the MI ablation was performed on the MI line just below the LAA neck targeting the earliest activation recording site of the LAA catheter during pacing from the coronary sinus (CS)...
August 8, 2017: Oncotarget
https://www.readbyqxmd.com/read/28879526/intracardiac-echocardiography-for-structural-heart-and-electrophysiological-interventions
#16
REVIEW
Craig Basman, Yuvrajsinh J Parmar, Itzhak Kronzon
PURPOSE OF REVIEW: With an increasing number of interventional procedures performed for structural heart disease and cardiac arrhythmias each year, echocardiographic guidance is necessary for safe and efficient results. The purpose of this review article is to overview the principles of intracardiac echocardiography (ICE) and describes the peri-interventional role of ICE in a variety of structural heart disease and electrophysiological interventions. RECENT FINDINGS: Both transthoracic (TTE) and transesophageal echocardiography have limitations...
September 6, 2017: Current Cardiology Reports
https://www.readbyqxmd.com/read/28877379/short-term-safety-and-efficacy-of-left-atrial-appendage-closure-with-the-watchman-device-in-patients-with-small-left-atrial-appendage-ostia
#17
Ganesh Venkataraman, S Adam Strickberger, Shephal Doshi, Christopher Ellis, Dhanunjaya Lakkireddy, S Patrick Whalen, Frank Cuoco
INTRODUCTION: Left atrial appendage (LAA) closure with the WATCHMAN device, according to FDA labelling, is recommended in patients with a maximal LAA ostial width between 17-31 mm. The safety and efficacy of LAA closure in patients with a maximal LAA ostial width < 17 mm has not been evaluated. The goal of this study was to determine the acute and short-term safety and efficacy of LAA closure with the WATCHMAN device in patients with a maximal LAA ostial width < 17 mm. METHODS AND RESULTS: Thirty-two consecutive patients with a maximal LAA ostial width < 17 mm as determined by a screening transesophageal echocardiogram (TEE) underwent LAA closure with the WATCHMAN device between March 2015 and November 2016 at five medical centers, and were included in this study...
September 6, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/28866042/intracardiac-echocardiography-from%C3%A2-the%C3%A2-left-atrium-for-procedural-guidance-of-transcatheter-left-atrial-appendage%C3%A2-occlusion
#18
Kasper Korsholm, Jesper Møller Jensen, Jens Erik Nielsen-Kudsk
OBJECTIVES: The aim of this study was to compare the efficacy and safety of intracardiac echocardiography (ICE) from the left atrium (LA) with transesophageal echocardiography (TEE) for procedural guidance of transcatheter left atrial appendage occlusion (LAAO). BACKGROUND: TEE with general anesthesia is the current gold standard to guide LAAO. By the use of ICE from the LA, LAAO can be performed in local anesthesia and may potentially have advantages over TEE. METHODS: A single-center, cohort study of patients undergoing LAAO with the Amplatzer Cardiac Plug or Amulet (St...
August 24, 2017: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28866032/intracardiac-echocardiography-for%C3%A2-endovascular-left-atrial-appendage%C3%A2-closure-is-it-ready-for-primetime
#19
EDITORIAL
Jacqueline Saw
No abstract text is available yet for this article.
August 24, 2017: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28865942/left-atrial-appendage-closure-in-patients-with-intracranial-haemorrhage-and-atrial-fibrillation
#20
F Fayos-Vidal, D Arzamendi-Aizpurua, X Millán-Álvarez, D Guisado-Alonso, P Camps-Renom, L Prats-Sánchez, A Martínez-Domeño, R Delgado-Mederos, J Martí-Fàbregas
INTRODUCTION: The use of oral anticoagulants in patients with a history of atrial fibrillation (AF) and intracranial haemorrhage (ICH) is controversial on account of the risk of haemorrhagic stroke recurrence. This study presents our experience regarding the safety and efficacy of percutaneous left atrial appendage closure (LAAC), an alternative to anticoagulation in these patients. METHODS: We conducted a retrospective, single-centre, observational study. LAAC was performed in patients with a history of ICH and non-valvular AF...
August 30, 2017: Neurología: Publicación Oficial de la Sociedad Española de Neurología
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