WITHDRAWN: Transthoracic Doppler Echocardiographic Measurement of Left Atrial Appendage Blood Flow Velocity: Comparison with Transoesophageal Measurement

2003 ◽  
Author(s):  
N FUKUDA ◽  
H SHINOHARA ◽  
K SAKABE ◽  
Y ONOSE ◽  
T NADA ◽  
...  
Keyword(s):  
Blood Flow ◽  
Flow Velocity ◽  
Blood Flow Velocity ◽  
Left Atrial ◽  
Left Atrial Appendage ◽  
Atrial Appendage ◽  
Echocardiographic Measurement

scholarly journals The effect of transient balloon occlusion of the mitral valve on left atrial appendage blood flow velocity and spontaneous echo contrast

2000 ◽  
Vol 23 (7) ◽  
pp. 501-506 ◽  
Author(s):  
Jianan Wang ◽  
Daniel Chung Ann Choo ◽  
Xianglan Zhang ◽  
Qian Yang ◽  
Tangchao Xian ◽  
...  
Keyword(s):  
Blood Flow ◽  
Mitral Valve ◽  
Flow Velocity ◽  
Blood Flow Velocity ◽  
Left Atrial ◽  
Left Atrial Appendage ◽  
Balloon Occlusion ◽  
Atrial Appendage ◽  
Spontaneous Echo Contrast

scholarly journals Non-Pharmacological Therapy for Atrial Fibrillation: Managing the Left Atrial Appendage

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Sushil Allen Luis ◽  
Damian Roper ◽  
Alexander Incani ◽  
Karl Poon ◽  
Haris Haqqani ◽  
...  
Keyword(s):  
Atrial Fibrillation ◽  
Blood Flow ◽  
Blood Flow Velocity ◽  
Left Atrial ◽  
Left Atrial Appendage ◽  
Thrombus Formation ◽  
Pharmacological Therapy ◽  
Atrial Appendage ◽  
Ageing Population ◽  
Increased Risk

The prevalence of atrial fibrillation (AF) is increasing in parallel with an ageing population leading to increased morbidity and mortality. The most feared complication of AF is stroke, with the arrhythmia being responsible for up to 20% of all ischemic strokes. An important contributor to this increased risk of stroke is the left atrial appendage (LAA). A combination of the LAA's unique geometry and atrial fibrillation leads to low blood flow velocity and stasis, which are precursors to thrombus formation. It has been hypothesized for over half a century that excision of the LAA would lead to a reduction in the incidence of stroke. It has only been in the last 20–25 years that the knowledge and technology has been available to safely carry out such a procedure. We now have a number of viable techniques, both surgical and percutaneous, which will be covered in this paper.

scholarly journals Serum Uric Acid Level is correlated with Decreased Blood Flow Velocity of Left Atrial Appendage in Patients with Atrial Fibrillation

2013 ◽  
Vol 62 (18) ◽  
pp. C126-C127
Author(s):  
Murat Çelik ◽  
Emre Yalçınkaya ◽  
Yalçın Gökoğlan ◽  
Uygar Çağdaş Yüksel ◽  
Barış Buğan ◽  
...  
Keyword(s):  
Atrial Fibrillation ◽  
Blood Flow ◽  
Uric Acid ◽  
Flow Velocity ◽  
Uric Acid Level ◽  
Blood Flow Velocity ◽  
Left Atrial ◽  
Acid Level ◽  
Left Atrial Appendage ◽  
Serum Uric Acid Level

scholarly journals Left atrial appendage orifice area and morphology is closely associated with flow velocity in patients with nonvalvular atrial fibrillation

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Lei Chen ◽  
Changjiang Xu ◽  
Wensu Chen ◽  
Chaoqun Zhang
Keyword(s):  
Atrial Fibrillation ◽  
Flow Velocity ◽  
Left Atrial ◽  
Left Atrial Appendage ◽  
Linear Regression Analysis ◽  
Left Ventricular ◽  
Atrial Appendage ◽  
Mechanical Function ◽  
Orifice Area ◽  
The Relationship

Abstract Background Thromboembolic events are the most serious complication of atrial fibrillation (AF), and the left atrial appendage (LAA) is the most important site of thrombosis in patients with AF. During the period of COVID-19, a non-invasive left atrial appendage detection method is particularly important in order to reduce the exposure of the virus. This study used CT three-dimensional reconstruction methods to explore the relationship between LAA morphology, LAA orifice area and its mechanical function in patients with non-valvular atrial fibrillation (NVAF). Methods A total of 81 consecutive patients with NVAF (36 cases of paroxysmal atrial fibrillation and 45 cases of persistent atrial fibrillation) who were planned to undergo catheter radiofrequency ablation were enrolled. All patients were examined by transthoracic echocardiography (TTE), TEE, and computed tomography angiography (CTA) before surgery. The LAA orifice area was obtained according to the images of CTA. According to the left atrial appendage morphology, it was divided into chicken wing type and non-chicken wing type. At the same time, TEE was performed to determine left atrial appendage flow velocity (LAAFV), and the relationship between the left atrial appendage orifice area and LAAFV was analyzed. Results The LAAFV in Non-chicken wing group was lower than that in Chicken wing group (36.2 ± 15.0 cm/s vs. 49.1 ± 22.0 cm/s, p-value < 0.05). In the subgroup analysis, the LAAFV in Non-chicken wing group was lower than that in Chicken wing group in the paroxysmal AF (44.0 ± 14.3 cm/s vs. 60.2 ± 22.8 cm/s, p-value < 0.05). In the persistent AF, similar results were observed (29.7 ± 12.4 cm/s vs. 40.8 ± 17.7 cm/s, p-value < 0.05). The LAAFV in persistent AF group was lower than that in paroxysmal AF group (34.6 ± 15.8 cm/s vs. 49.9 ± 20.0 cm/s, p-value < 0.001). The LAAFV was negatively correlated with left atrial dimension (R = − 0.451, p-value < 0.001), LAA orifice area (R= − 0.438, p-value < 0.001) and left ventricular mass index (LVMI) (R= − 0.624, p-value < 0.001), while it was positively correlated with LVEF (R = 0.271, p-value = 0.014). Multiple linear regression analysis showed that LAA morphology (β = − 0.335, p-value < 0.001), LAA orifice area (β = −  0.185, p-value = 0.033), AF type (β = − 0.167, p-value = 0.043) and LVMI (β = − 0.465, p-value < 0.001) were independent factors of LAAFV. Conclusions The LAA orifice area is closely related to the mechanical function of the LAA in patients with NVAF. The larger LAA orifice area and LVMI, Non-chicken wing LAA and persistent AF are independent predictors of decreased mechanical function of LAA, and these parameters might be helpful for better management of LA thrombosis.

scholarly journals Relationship left atrial strain and CHA2DS2-VASc score compared to left atrial appendage emptying flow velocity

2013 ◽  
Vol 34 (suppl 1) ◽  
pp. 2024-2024 ◽  
Author(s):  
K. Kurosawa ◽  
K. Negishi ◽  
R. Tateno ◽  
K. Masuda ◽  
M. Obokata ◽  
...  
Keyword(s):  
Flow Velocity ◽  
Left Atrial ◽  
Left Atrial Appendage ◽  
Atrial Appendage ◽  
Left Atrial Strain ◽  
Atrial Strain
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