Computed tomography findings associated with the reduction in left atrial appendage flow velocity in patients with atrial fibrillation

Ouchi, Kotaro; Sakuma, Toru; Higuchi, Takahiro; Yoshida, Jun; Narui, Ryosuke; Nojiri, Ayumi; Yamane, Teiichi; Ojiri, Hiroya

doi:10.1007/s00380-022-02041-y

Cited by 7 publications

(3 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The change in the anatomic structure of the LA and LAA caused by AF (Burrell et al, 2013; Ouchi et al, 2022a; Pathak et al, 2013) is one of the reasons for the occurrence of hemodynamic disorder and thrombosis in the LAA (Lee et al, 2015). According to some studies, the size of the LA as well as the size and depth of the LAA orifice were negatively correlated with the blood flow rate in the LAA (Chen et al, 2021; Lee et al, 2014, 2015; Matsumoto et al, 2017; Miki et al, 2022; Ouchi et al, 2022b). The decreased blood flow rate in the LAA is an important factor for SEC and thrombosis, and the blood flow rate is inversely proportional to thrombosis: the lower the flow rate, the higher the thrombosis (Ma et al, 2021).…”

Section: Discussionmentioning

confidence: 99%

Study on the correlation between false‐positive filling defect in LAA CT and LAA structure in patients with atrial fibrillation based on TEE

Guo

Dong

et al. 2022

Noninvasive Electrocardiol

View full text Add to dashboard Cite

Objective: This study aims to explore the actual meaning of "false positive filling defect" in left atrial appendage (LAA) computed tomography (CT) in patients with atrial fibrillation (AF), with transesophageal echocardiography (TEE) as the gold standard. Methods:Patients with AF undergoing cardiac CT angiography and TEE examinations for proposed radiofrequency catheter ablation between October 2020 and October 2021 were selected as the study subjects. Transesophageal echocardiography was taken as the "gold standard," and spontaneous echocardiographic contrast (SEC) and thrombus events were defined as positive events. The CT manifestations were classified into three groups (true positive, false positive, and true negative) to evaluate the differences in left atrium (LA) anterior-posterior diameter (LAAP), LA anterior wall thickness, and LAA orifice long diameter and short diameter, area, and depth between the three groups. Results:(1) There was no statistical difference in LA anterior wall thickness between the three groups (p > .05); there was a statistical difference in LAAP (only) between the true-positive group and the true-negative group (p < .05). ( 2) There was a statistical difference in LAA orifice long diameter, short diameter, and area between the true-positive group and the true-negative group as well as between the false-positive group and the true-negative group (p < .05). ( 3) There was a statistical difference in LAA depth between the true-positive group and the false-positive group as well as between the true-positive group and the true-negative group (p < .05). ( 4) The area under the receiver operator characteristic curve (AUC) of LAA depth affecting the LAA thrombus and SEC was 0.863 (confidence interval = 0.718-1.000), the sensitivity was 77.8%, and the specificity was 90.6% for predicting the occurrence of LAA thrombus and SEC in patients with nonvalvular AF (NVAF) and an LAA depth of ≥50.84 mm. Conclusions:There was a difference in LAA diameter between the TEE-based CT false-positive group and the other groups. A "CT false positive" is an objectively existing state, and CT might be able to identify the LAA hemodynamic disorder earlier than How to cite this article:

show abstract

Section: Discussionmentioning

confidence: 99%

Study on the correlation between false‐positive filling defect in LAA CT and LAA structure in patients with atrial fibrillation based on TEE

Guo

Dong

et al. 2022

Noninvasive Electrocardiol

View full text Add to dashboard Cite

show abstract

“…The residual LAA stump of less than 10 mm after the procedure measured by cardiac CT is considered to be clinically safe [ 68 ]. The reduction in flow velocity within the LAA is associated with imaging features on volume and filling defects in patients with AF, which indicates the risk of thromboembolic events [ 69 ]. A total of three ablation lines are suggested for pulmonary vein antral clamping during TVTCS for avoiding unnecessary repetitions [ 70 ].…”

Section: Cardiac Surgical Diseasesmentioning

confidence: 99%

Multimodality Cardiovascular Imaging for Totally Video-Guided Thorascopic Cardiac Surgery

Jiang,

Huang,

Yin

et al. 2024

Rev. Cardiovasc. Med.

View full text Add to dashboard Cite

Totally video-guided thorascopic cardiac surgery (TVTCS) represents one of the most minimally invasive access routes to the heart. Its feasibility and safety can be guaranteed by an experienced surgeon with skilled operative techniques under the guidance of a video signal via thoracoscopy and the imaging from transesophageal echocardiography. At present, this surgical approach has been applied for atrioventricular valve disease, atrial septum defects plus and partial anomalous pulmonary venous drainage, cardiac tumors, hypertrophic obstructive cardiomyopathy, aortic valve disease, and atrial fibrillation. Multimodality cardiovascular imaging, including echocardiography, X-ray, computed tomography (CT), magnetic resonance imaging (MRI) and cardiac catheterization, provides morphologic characteristics and function status of the cardiovascular system and a comprehensive view of the target anatomy. In this review, the benefits of multimodality cardiovascular imaging are summarized for the clinical practice of TVTCS, including the preoperative preparation, intraoperative guidance and postoperative supervision. The disease categories are also individually reviewed on the basis of multimodality cardiovascular imaging, to ensure the feasibility and safety for TVTCS. Cardiovascular imaging technologies not only confirm who is a candidate for this surgical technique, but also provide technical support during the procedure and for postop follow to assess the clinical outcomes. Multimodality cardiovascular imaging is instrumental to provide the requirements to solve the problems for conduction of TVTCS; and to provide individualized protocols with high-resolution and real-time dynamic imaging fusion.

show abstract

“…Морфологический тип УЛП и тип ФП не были значимыми предикторами уменьшения скорости кровотока в УЛП. По данным этой работы, параметры, полученные с помощью КТ, могут предоставить дополнительную информацию для стратификации риска и лечения при тромбоэмболических осложнениях у пациентов с ФП [13].…”

Section: принятые сокращенияunclassified

Possibilities of computed and magnetic resonance imaging of the heart in patients with atrial fibrillation

Galyautdinov

Ibragimova²,

Galeeva

2023

Kazan Med J

View full text Add to dashboard Cite

Computed and magnetic resonance imaging of the heart has been widely used in recent years in patients with atrial fibrillation. They are used to determine the morphology of the heart, the presence of intracardiac thrombi, quantify the structures of the heart, thrombosis of intracardiac devices, determine tactics for surgical interventions, and other purposes. These methods of instrumental diagnostics can be used as an alternative to transesophageal echocardiography, which has a number of limitations and disadvantages compared to computed tomography and magnetic resonance imaging. Computed and magnetic resonance imaging of the heart are used to avoid invasiveness in the study of the heart, to improve the accuracy of measuring heart structures, to reduce the number of diagnostic methods used before various surgical interventions in patients with atrial fibrillation, and also, according to epidemic indications, as part of the prevention of the spread of coronavirus infection. In addition, magnetic resonance imaging allows to avoid radiation exposure to the patient. The review presents the results of studies, meta-analyses of pooled samples, as well as a description of the clinical possibilities of computed and magnetic resonance imaging of the heart in patients with atrial fibrillation. Publications on the use of these methods for visualization of thrombi in the left atrium and its appendage, in pulmonary vein ablation and occlusion of the left atrial appendage, as well as data on visualization of the residual flow around the occlusive device and thrombosis of intracardiac devices are presented. According to the results of a literature review, computed tomography and magnetic resonance imaging of the heart have similar or higher imaging capabilities compared to transesophageal echocardiography, as well as some advantages over it, primarily the non-invasiveness of the procedure. The works demonstrating the possibilities of computed tomography of the heart for the diagnosis of coronary heart disease in patients with atrial fibrillation are presented. In preparing the review, the literature search method in PubMed databases for the period 20132022 was used.

show abstract

Computed tomography findings associated with the reduction in left atrial appendage flow velocity in patients with atrial fibrillation

Cited by 7 publications

References 36 publications

Study on the correlation between false‐positive filling defect in LAA CT and LAA structure in patients with atrial fibrillation based on TEE

Study on the correlation between false‐positive filling defect in LAA CT and LAA structure in patients with atrial fibrillation based on TEE

Multimodality Cardiovascular Imaging for Totally Video-Guided Thorascopic Cardiac Surgery

Possibilities of computed and magnetic resonance imaging of the heart in patients with atrial fibrillation

Contact Info

Product

Resources

About

Computed tomography findings associated with the reduction in left atrial appendage flow velocity in patients with atrial fibrillation

Cited by 7 publications

References 36 publications

Study on the correlation between false‐positive filling defect in LAA CT and LAA structure in patients with atrial fibrillation based on TEE

Study on the correlation between false‐positive filling defect in LAA CT and LAA structure in patients with atrial fibrillation based on TEE

Multimodality Cardiovascular Imaging for Totally Video-Guided Thorascopic Cardiac Surgery

Possibilities of computed and magnetic resonance imaging of the heart in patients with ­atrial fibrillation

Contact Info

Product

Resources

About

Possibilities of computed and magnetic resonance imaging of the heart in patients with atrial fibrillation