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Predictive Ability Of More Than 3-day Pre-atrial Fibrillation Ablation Cardiac Computed Tomography In Detection Of Left Atrial Thrombus
Introduction: Several studies described the diagnostic accuracy of Cardiac Computed Tomography (CCT) with delayed phase in detection of LA/LAA thrombus. Pre-Atrial fibrillation ablation (AFA) CCT is primarily done for pulmonary vein mapping. CCT performed alone within 72 hours prior to AFA has been suggested to be an alternative to Transesophageal Echocardiography (TEE) to rule out LAA thrombus in the low-intermediate stroke risk patients.(1) Hounsfield Unit ratio (HU) of> 0.75 between left atrial appendage (LAA) and ascending aorta (AA) has been suggested as reliable indicator of absence of thrombus on CCT(2) However, pre...
Source: Journal of Cardiovascular Computed Tomography - July 1, 2023 Category: Radiology Authors: L. Shali, A. Villarosa, J. Taylor Source Type: research

Computed Tomography Angiogram: Diagnosing Device Placement Failure
In patients with non-valvular atrial fibrillation (AF) and increased stroke risk, the left atrial appendage (LAA) is a primary source of thrombus [1]. Percutaneous left atrial appendage closure (LAAC), a minimally invasive procedure, is increasingly performed to reduce AF stroke risk [1]. For successful clinical outcomes, it is therefore imperative that the Watchman implant —one such LAA closure device—maintains long-term efficacy. The PROTECT-AF trial, for instance, reported peridevice leak in 32% of patients post-LAAC.
Source: Journal of Cardiovascular Computed Tomography - March 23, 2020 Category: Radiology Authors: Ilana Golub, Suvasini Lakshmanan, Francesca Calicchio, Matthew J. Budoff Tags: Case report Source Type: research

Aortic valve calcification as a risk factor for major complications and reduced survival after transcatheter replacement
Aortic valve calcification is supposed to be a possible cause of embolic stroke or subclinical valve thrombosis after transcatheter aortic valve replacement (TAVR). We aimed to assess the role of aortic valve calcification in the occurrence of in-hospital clinical complications and survival after TAVR.
Source: Journal of Cardiovascular Computed Tomography - December 6, 2019 Category: Radiology Authors: Francesco Pollari, Wolfgang Hitzl, Ferdinand Vogt, Michela Cuomo, Johannes Schwab, Claudius S öhn, Jurij M. Kalisnik, Christian Langhammer, Thomas Bertsch, Theodor Fischlein, Steffen Pfeiffer Source Type: research

Using CT left atrial appendage imaging to identify patients at higher risk of stroke
More than the last 5 –10 years, the left atrial appendage (LAA) has become an increasingly important anatomic site for cardiologists, especially in the prevention and management of stroke.1 Once felt to be a relatively benign entity, its role as a nidus for thrombus (especially in those with atrial fibrillation (AF)) has long been recognised, but with the advent of LAA exclusion devices, which may be internal (such as Watchman, Wavecrest and Amplatz devices), or external (such as the Lariat laso or Atriclip), the need to accurately assess the morphology of left atrial appendage has become increasingly important, both in ...
Source: Journal of Cardiovascular Computed Tomography - May 24, 2019 Category: Radiology Authors: E. Nicol Tags: Editorial Source Type: research

CT imaging for left atrial appendage closure: A review and pictorial essay
Cardioembolic stroke is an important complication of atrial fibrillation. The thrombus responsible for this arises from the left atrial appendage (LAA) in>90% of cases, providing the rationale for device-based LAA closure as a means of thromboprophylaxis. Although oral anticoagulant therapy remains the mainstay for reducing the risk of stroke in patients with atrial fibrillation, an increasing number of patients, particularly those ineligible for conventional pharmacotherapy, are being offered percutaneous left atrial appendage closure.
Source: Journal of Cardiovascular Computed Tomography - January 24, 2015 Category: Radiology Authors: Tevfik Fehmi Ismail, Sandeep Panikker, Vias Markides, John P. Foran, Simon Padley, Michael B. Rubens, Tom Wong, Edward Nicol Tags: Pictorial Essay Source Type: research

Computed Tomography Imaging for Left Atrial Appendage Closure: A Review and Pictorial Essay
Cardioembolic stroke is an important complication of atrial fibrillation (AF). The thrombus responsible for this arises from the left atrial appendage (LAA) in>90% of cases, providing the rationale for device-based LAA closure as a means of thromboprophylaxis. While oral anticoagulant therapy remains the mainstay for reducing the risk of stroke in patients with AF, an increasing number of patients, particularly those ineligible for conventional pharmacotherapy, are being offered percutaneous left atrial appendage closure.
Source: Journal of Cardiovascular Computed Tomography - January 24, 2015 Category: Radiology Authors: Tevfik F. Ismail, Sandeep Panikker, Vias Markides, John P. Foran, Simon Padley, Michael B. Rubens, Tom Wong, Edward Nicol Source Type: research