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Mri left atrial thrombus ablation

Kenichi Sugioka, Masahiko Takagi, Shinichi Sakamoto, Suwako Fujita, Asahiro Ito, Shinichi Iwata, Yoshiki Matsumura, Masashi Nakagawa, Atsushi Doi, Yukio Miki, Minoru Yoshiyama, Makiko Ueda
BACKGROUND: Silent brain infarction (SBI) is often found in patients with atrial fibrillation (AF) and may be related to cognitive decline. We investigated the predictors of SBI on brain magnetic resonance imaging (MRI) using transesophageal echocardiography (TEE) in patients with nonvalvular AF. METHODS: The study population consisted of 103 neurologically asymptomatic patients with nonvalvular AF who underwent TEE before transcatheter AF ablation (76 men; mean age 63 ± 10 years)...
June 2015: American Heart Journal
Aline Mühl, Michael Kühne, Christian Sticherling, Sven Knecht
No abstract text is available yet for this article.
August 2015: Journal of Cardiovascular Electrophysiology
Nazem Akoum, Genaro Fernandez, Brent Wilson, Christopher Mcgann, Eugene Kholmovski, Nassir Marrouche
INTRODUCTION: Transesophageal echocardiography (TEE) is used to evaluate for left atrial appendage (LAA) thrombi prior to restoration of sinus rhythm in atrial fibrillation (AF). We examined the relationship of atrial fibrosis quantified using late gadolinium enhancement MRI (LGE-MRI) with TEE findings. METHODS AND RESULTS: We included 178 patients with AF, undergoing TEE and LGE-MRI prior to ablation or cardioversion. LGE-MRI and subsequent image processing was used to quantify atrial fibrosis based on signal intensity analysis...
October 2013: Journal of Cardiovascular Electrophysiology
Luigi Di Biase, Pasquale Santangeli, Matteo Anselmino, Prasant Mohanty, Ilaria Salvetti, Sebastiano Gili, Rodney Horton, Javier E Sanchez, Rong Bai, Sanghamitra Mohanty, Agnes Pump, Mauricio Cereceda Brantes, G Joseph Gallinghouse, J David Burkhardt, Federico Cesarani, Marco Scaglione, Andrea Natale, Fiorenzo Gaita
OBJECTIVES: This study investigated the left atrial appendage (LAA) by computed tomography (CT) and magnetic resonance imaging (MRI) to categorize different LAA morphologies and to correlate the morphology with the history of stroke/transient ischemic attack (TIA). BACKGROUND: LAA represents one of the major sources of cardiac thrombus formation responsible for TIA/stroke in patients with atrial fibrillation (AF). METHODS: We studied 932 patients with drug-refractory AF who were planning to undergo catheter ablation...
August 7, 2012: Journal of the American College of Cardiology
Marcos Daccarett, Chris J McGann, Nazem W Akoum, Rob S MacLeod, Nassir F Marrouche
Atrial fibrillation is a significant public health burden, with clinically, epidemiologically and economically significant repercussions. In the last decade, catheter ablation has provided an improvement in morbidity and quality of life, significantly reducing long-term healthcare costs and avoiding recurrences compared with drug therapy. Despite recent progress in techniques, current catheter ablation success rates fall short of expectations. Late gadolinium-enhancement cardiovascular MRI is a well-established tool to image the myocardium and, most specifically, the left atrium...
January 2011: Expert Review of Cardiovascular Therapy
Roy Beinart, E Kevin Heist, John B Newell, Godtfred Holmvang, Jeremy N Ruskin, Moussa Mansour
UNLABELLED: Risk of Stroke/TIA in Patients With Atrial Fibrillation. INTRODUCTION: Most strokes in patients with atrial fibrillation (AF) arise from thrombus formation in left atrial appendage (LAA). Our aim was to identify LAA features associated with a higher stroke risk in patients with AF using magnetic resonance imaging and angiography (MRI/MRA). METHODS: The study included 144 patients with nonvalvular AF who were not receiving warfarin and who underwent MRI/MRA prior to catheter ablation for AF...
January 2011: Journal of Cardiovascular Electrophysiology
Parwis B Rahmanian, Javier G Castillo, Davendra Mehta, David H Adams, Farzan Filsoufi
BACKGROUND: Simplifications of the Cox-Maze procedure to treat atrial fibrillation (AF) include epicardial pulmonary vein (PV) isolation using various sources to create lines of conduction block. The creation of transmural lesions has been a concern. The heat-sink effect caused by blood flow has limited the effectiveness of unipolar radiofrequency and linear application of cryothermy, which should be abolished when clamp devices are used for PV isolation. The efficacy and safety of epicardial beating-heart PV isolation with clamp devices using cryothermy or bipolar radiofrequency energy was studied...
September 2008: Annals of Thoracic Surgery
Spencer J Melby, Sydney L Gaynor, Jordon G Lubahn, Anson M Lee, Paymon Rahgozar, Shelton D Caruthers, Todd A Williams, Richard B Schuessler, Ralph J Damiano
OBJECTIVE: The Cox maze procedure is the most effective surgical treatment for atrial fibrillation; however, its complexity has limited its clinical utility. The purpose of this study was to simplify the procedure by using an irrigated bipolar radiofrequency ablation device on the beating heart without cardiopulmonary bypass. METHODS: Six domestic pigs underwent median sternotomy. The pulmonary veins were circumferentially ablated. Electrical isolation was confirmed by pacing...
October 2006: Journal of Thoracic and Cardiovascular Surgery
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