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https://www.readbyqxmd.com/read/28229312/routine-18-f-fdg-pet-ct-does-not-detect-inflammation-in-the-left-atrium-in-patients-with-atrial-fibrillation
#1
Philipp S Lange, Nemanja Avramovic, Gerrit Frommeyer, Kristina Wasmer, Christian Pott, Lars Eckardt, Christian Wenning
Increasing evidence supports a role of inflammation in the development of atrial fibrillation (AF). However, direct evidence of persistent inflammatory activity in the atria of AF patients is scarce. In this study, we used 18-Fluor-Deoxyglucose positron emission tomography computed tomography ((18)F-FDG PET/CT) to determine atrial inflammation in patients with and without AF. Retrospectively, (18)F-FDG PET/CT scans were analyzed. 37 patients with a history of AF were compared to an age and sex matched control group with no history of AF...
February 22, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28228889/application-of-hong-s-technique-for-removal-of-stuck-hemodialysis-tunneled-catheter-to-pacemaker-leads
#2
Chaudhry Adeel Ebad, Stephen Davitt, Ramal Gnanasekaran, Amjad Khan, Anne-Marie Moran
The term "stuck catheter" refers to situations where a central venous catheter cannot be removed from the central veins or right atrium using standard technique, usually due to development of a fibrin sheath leading to adherence to SVC or right atrial wall. Endoluminal dilatation is an interventional radiology technique that has been previously reported in the removal of stuck hemodialysis catheters, and to the best of our knowledge, this case describes the first application of the technique to remove a hemodialysis catheter that was adherent to SVC wall and transvenous pacemaker leads...
March 2017: Radiology case reports
https://www.readbyqxmd.com/read/28228391/penetrating-mitral-annular-abscess-ruptured-into-the-left-atrium-a-rare-cause-of-mitral-regurgitation
#3
Gopal Chandra Ghosh, Amal Paul, Anoop George Alex, Paul V George
No abstract text is available yet for this article.
February 21, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28227466/engineering-based-assessment-for-a-shape-design-of-a-pediatric-eptfe-pulmonary-conduit-valve
#4
Yusuke Tsuboko, Yasuyuki Shiraishi, Akihiro Yamada, Tomoyuki Yambe, Hidekazu Miura, Seitaro Mura, Masaaki Yamagishi, Yusuke Tsuboko, Yasuyuki Shiraishi, Akihiro Yamada, Tomoyuki Yambe, Hidekazu Miura, Seitaro Mura, Masaaki Yamagishi, Akihiro Yamada, Seitaro Mura, Yasuyuki Shiraishi, Tomoyuki Yambe, Yusuke Tsuboko, Hidekazu Miura, Masaaki Yamagishi
The authors examined the hemodynamic characteristics of expanded polytetrafluoroethylene (ePTFE) pulmonary valved conduits quantitatively by our originally developed pediatric pulmonary mechanical circulatory system, in order to suggest the optimal shape design. The system consisted of pneumatically driven right atrium and ventricle model, a pulmonary valve chamber, and elastic pulmonary compliance model with peripheral vascular resistance units, a venous reservoir. We employed two different types of ePTFE valve and evaluated the relationship between the leaflets motion and hemodynamic characteristics by using a high-speed video camera...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226541/combined-reconstruction-of-atrial-morphology-and-paracardial-fat-depositions-to-study-remodeling-in-atrial-fibrillation
#5
N Popovic, P Haemers, R Willems, P Claus, N Popovic, P Haemers, R Willems, P Claus, P Claus, P Haemers, N Popovic, R Willems
Atrial fibrillation (AF) is the most frequent sustained cardiac arrhythmia. AF is shown to be a progressive disease, which is strongly associated with important structural (morphological and histological), electrical and mechanical remodeling of the left atrium (LA). Adipose tissue accumulation has been shown to be a risk factor in AF. We set out to explore the connection between adipose tissue coverage of the LA surface, for both the complete LA and specific regions and the progression of AF. In this study we propose a methodology to study the regional coverage of the left-atrial wall with adipose tissue based on magnetic resonance data...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28219756/atrial-angioleiomyoma-with-myopericytoma-like-features-a-case-report
#6
Hussein Nassereddine, Aurélie Cazes, Constance Verdonk, Benjamin Assous, Raphael Dautry, Patrick Nataf, Michel Wassef, Lydia Deschamps
A 66-year-old female patient was referred to our hospital for resection of a right atrial mass. Four months earlier, she had suffered an acute cerebrovascular accident due to occlusion of the sylvian segment of the right middle cerebral artery from atheromatous tight stenosis in the right internal carotid artery. Later, investigations with transthoracic and transesophageal echocardiography revealed a 3.4-cm right atrial mass that was resected surgically. Microscopic evaluation revealed a well-circumscribed nodular tumor, located within the interatrial septum, and corresponding to an angioleiomyoma (ALM)...
February 8, 2017: Cardiovascular Pathology: the Official Journal of the Society for Cardiovascular Pathology
https://www.readbyqxmd.com/read/28219554/intravascular-lipiodol-presenting-as-an-atrial-mass
#7
Ruud S Kootte, Joost D E Haeck, Krijn P van Lienden, Wim J P van Boven, Allard C van der Wal, Hans H de Boer
A 68-year-old woman, previously treated with embolization of the thoracic duct with Lipiodol (an ethiodized oil injection) and cyanoacrylate glue (a topical tissue adhesive), was admitted with an asymptomatic mass in the inferior vena cava (IVC) and right atrium. The mass was surgically removed, and pathologic analysis revealed a Lipiodol-containing thrombus. To our knowledge, this is the first clinicopathologic report of Lipiodol-induced thrombus presenting as an intracavitary mass.
March 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28217939/pitx2-dependent-gene-regulation-in-atrial-fibrillation-and-rhythm-control
#8
Fahima Syeda, Paulus Kirchhof, Larissa Fabritz
Atrial fibrillation (AF) is a common arrhythmia. Better prevention and treatment of AF are needed to reduce AF-associated morbidity and mortality. There are several major mechanisms that cause AF in patients, including a genetic predisposition to develop AF. Genome-wide association studies (GWAS) have identified genetic variants associated with AF populations, with the strongest hits clustering on chromosome 4q25, close to the gene for the homeobox transcription factor PITX2. The effect of these common gene variants on cardiac PITX2 mRNA is currently under study...
February 19, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28217223/long-term-reliability-of-sweet-tip-type-screw-in-leads
#9
Asuka Takano, Gaku Sekita, Minako Watanabe, Hiroshi Mukaida, Sayaka Komatsu, Haruna Tabuchi, Hidemori Hayashi, Takashi Tokano, Masataka Sumiyoshi, Yuji Nakazato, Hiroyuki Daida
BACKGROUND: Active fixation leads have provided stable atrial and ventricular pacing; however, long-term follow-up data have not been satisfactory. The purpose of this study was to investigate the long-term reliability of active fixation leads and their electrical characteristic stability. METHODS: A total of 1196 pacing leads were implanted in 830 patients consecutively between 2002 and 2013. In this retrospective study, we were able to trace 1092 leads in 750 patients to investigate the prognosis of implanted leads...
February 2017: Journal of Arrhythmia
https://www.readbyqxmd.com/read/28213924/diagnostic-paradox-ruptured-aneurysm-of-sinus-of-valsalva-simulating-tricuspid-valve-endocarditis
#10
Mehar Hoda, Arushi Verma, Sridevi Alapati, Srilatha Alapati, Tharakanatha R Yarrabolu
Rupture of aneurysm of sinus of Valsalva into the right atrium mimicking tricuspid valve endocarditis is a rare presentation. We review a case of spontaneous rupture of aneurysm of sinus of Valsalva into the right atrium presenting as a murmur. Transthoracic echocardiogram showed a mobile mass that appeared to be attached to the tricuspid valve leaflet with moderate tricuspid regurgitation suggestive of tricuspid valve endocarditis. The diagnosis was confirmed as spontaneous rupture of noncoronary sinus in to the right atrium by transesophageal echocardiogram...
February 18, 2017: Echocardiography
https://www.readbyqxmd.com/read/28211132/comparison-of-left-atrial-voltage-between-sinus-rhythm-and-atrial-fibrillation-in-association-with-electrogram-wave-form
#11
Masaharu Masuda, Masashi Fujita, Osamu Iida, Shin Okamoto, Takayuki Ishihara, Kiyonori Nanto, Takashi Kanda, Akihiro Sunaga, Takuya Tsujimura, Yasuhiro Matsuda, Takuya Ohashi, Masaaki Uematsu
BACKGROUND: The efficacy of low-voltage-guided ablation in addition to pulmonary vein (PV) isolation for atrial fibrillation (AF) has been reported with voltage mapping being performed during sinus rhythm (SR) or AF. The study aimed to compare the left atrial voltage between SR and AF in association with the electrogram wave form. METHODS: This prospective observational study included 30 consecutive patients with persistent AF. After completion of PV isolation, electrogram points were taken during both SR and AF at the identical locations evenly throughout the left atrium...
February 16, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28209960/-right-sided-pneumonectomy-with-left-atrium-resection-under-cardiopulmonary-bypass-in-the-patient-with-lung-cancer-the-first-case-in-russia
#12
Yu V Belov, R N Komarov, V D Parshin, A G Yavorovsky, S V Chernyavsky, G V Mnatsakanyan
No abstract text is available yet for this article.
2017: Khirurgiia
https://www.readbyqxmd.com/read/28207381/personalized-models-of-human-atrial-electrophysiology-derived-from-endocardial-electrograms
#13
Cesare Corrado, John Whitaker, Henry Chubb, Steven Williams, Matthew Wright, Jaswinder Gill, Mark O'Neill, Steven Niederer
OBJECTIVE: Computational models represent a novel framework for understanding the mechanisms behind atrial fibrillation (AF) and offer a pathway for personalizing and optimizing treatment. The characterization of local electrophysiological properties across the atria during procedures remains a challenge. The aim of this work is to characterize the regional properties of the human atrium from multi-electrode catheter measurements. METHODS: We propose a novel method that characterizes regional electrophysiology properties by fitting parameters of an ionic model to conduction velocity and effective refractory period restitution curves obtained by a s1 s2 pacing protocol applied through a multi-electrode catheter...
May 30, 2016: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28207162/plasma-oxidative-stress-and-inflammatory-biomarkers-are-associated-with-the-sizes-of-the-left-atrium-and-pulmonary-vein-in-atrial-fibrillation-patients
#14
Jin-Yi Li, Yan He, Hong-Hong Ke, Yu Jin, Zhi-Yuan Jiang, Guo-Qiang Zhong
BACKGROUND: Oxidative stress and inflammatory processes are responsible for the pathogenesis of AF, but their relationship with the sizes of the LA and PVs in AF patients remains unclear. HYPOTHESIS: Oxidative stress and inflammatory processes are associated with the sizes of the LA and PVs in AF patients. METHODS: 82 AF patients were compared to 30 control patients by using a case-control study design. Oxidative stress, inflammatory biomarkers and the sizes of the LA and PVs were detected...
February 16, 2017: Clinical Cardiology
https://www.readbyqxmd.com/read/28205119/use-of-three-dimensional-computed-tomography-overlay-for-real-time-cryoballoon-ablation-in-atrial-fibrillation-reduces-radiation-dose-and-contrast-dye
#15
B Oude Velthuis, M Molenaar, H G Reinhart Dorman, J Y Stevenhagen, M F Scholten, J van der Palen, J M van Opstal
AIMS: Cryoballoon pulmonary vein (PV) isolation in patients with atrial fibrillation has proven to be effective in short-term and long-term follow-up. To visualise the PV anatomy, pre-ablation contrast pulmonary venography is commonly performed. Three-dimensional (3D) computed tomography (CT) overlay is a new technique creating a live 3D image of the left atrium by integrating a previously obtained CT scan during fluoroscopy. To evaluate the benefits of 3D CT overlay during cryoballoon ablation, we studied the use of 3D CT overlay versus contrast pulmonary venography in a randomised fashion in patients with paroxysmal atrial fibrillation undergoing cryoballoon PV isolation...
February 15, 2017: Netherlands Heart Journal
https://www.readbyqxmd.com/read/28204916/-remodeling-of-the-aging-heart-sinus-node-dysfunction-and-atrial-fibrillation
#16
Jörg Weirich
The incidence of both sinus node dysfunction (SND) and atrial fibrillation (AF) increases with age. SND and AF frequently coexist. Likewise, they are often associated with cardiovascular diseases. Both arrhythmias share similar pathomechanisms such as structural and functional remodeling, i. e., degenerative fibrosis and altered Ca(2+) handling, respectively. A growing body of evidence suggests an important role for the CamKII (Ca(2+)/calmodulin-dependent protein kinase II) in structural as well as in functional remodeling...
February 15, 2017: Herzschrittmachertherapie & Elektrophysiologie
https://www.readbyqxmd.com/read/28204434/isolation-of-the-posterior-left-atrium-for-patients-with-persistent-atrial-fibrillation-routine-adenosine-challenge-for-dormant-posterior-left-atrial-conduction-improves-long-term-outcome
#17
Alex J A McLellan, Sandeep Prabhu, Alex Voskoboinik, Michael C G Wong, Tomos E Walters, Bhupesh Pathik, Gwilym M Morris, Ashley Nisbet, Geoffrey Lee, Joseph B Morton, Jonathan M Kalman, Peter M Kistler
No abstract text is available yet for this article.
February 15, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28202256/transseptal-puncture-review-of-anatomy-techniques-complications-and-challenges
#18
REVIEW
Barry O'Brien, Haroon Zafar, Simon De Freitas, Faisal Sharif
In recent years, the transseptal puncture approach has enabled passage of increasingly large and complex devices into the left atrium. Traditional tools remain effective in creating and dilating the initial puncture, with an acceptable safety profile. Even for skilled operators, the procedure is technically demanding and requires sound understanding of atrial anatomy. Intracardiac echocardiography is useful in cases of previous septal repair, poorly defined fossa ovalis anatomy or when considering patent foramen ovale portal crossing...
February 4, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28202247/radiological-characteristics-of-atrial-myxoma-in-cardiac-computed-tomography
#19
Kawa Haji, Arthur Nasis
BACKGROUND: Although the primary role of Cardiac Computed Tomography (CCT) is assessment of the coronary arteries, the technique also allows detailed examination of cardiac structures and other cardiac pathologies including cardiac myxoma. However, limited data exists regarding the CCT characteristics of cardiac myxoma. OBJECTIVE: To describe the radiological characteristics of a series of cardiac myxomas in CCT. METHODS: We retrospectively identified all patients at our tertiary urban referral centre with cardiac myxoma on CCT over a seven-year period between July 2008 and July 2015...
February 7, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28199804/gas-in-the-left-atrium-and-ventricle
#20
Mary Thomson, Fredy El Sakr
A 60-year-old man with coronary artery disease, ischemic cardiomyopathy with biventricular implantable cardioverter–defibrillator placement, and atrial fibrillation presented with chest pain and numbness in both arms. During his initial presentation, he suddenly collapsed and became unresponsive...
February 16, 2017: New England Journal of Medicine
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