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Left Atrial Remodeling Assessed by Transthoracic Echocardiography Predicts Left Atrial Appendage Flow Velocity in Patients With Paroxysmal Atrial Fibrillation. 2016

Atai Watanabe, and Shinya Suzuki, and Hiroto Kano, and Syunsuke Matsuno, and Hideaki Takai, and Yuko Kato, and Takayuki Otsuka, and Tokuhisa Uejima, and Yuji Oikawa, and Kazuyuki Nagashima, and Hajime Kirigaya, and Takashi Kunihara, and Koichi Sagara, and Naohide Yamashita, and Hitoshi Sawada, and Tadanori Aizawa, and Junji Yajima, and Takeshi Yamashita
Department of Advanced Medical Science, The Institute of Medical Science, The University of Tokyo.

Atrial fibrillation (AF) is associated with an increased risk of stroke and other thromboembolic events. Left atrial (LA) thrombus formation is closely related to LA dysfunction, particularly to decreased LA appendage flow velocity (LAA-FV) in patients with AF. We estimated LAA-FV using parameters noninvasively obtained by transthoracic echocardiography (TTE) in patients with paroxysmal AF.Echocardiographic and clinical parameters were assessed in 190 patients with nonvalvular paroxysmal AF showing sinus heart rhythm during transesophageal echocardiography (TEE) and TTE.LAA-FV (60 ± 22 cm/s) significantly correlated with the time interval between the initiation of the P-wave on ECG and that of the A-wave of transmitral flow on TTE (PA-TMF, correlation coefficient, -0.32; P < 0.001), LA dimension (LAD, -0.31; P < 0.001), septal a' velocity of tissue Doppler imaging (TDI, 0.35; P < 0.001), E/e' ratio (-0.28, P < 0.001), E velocity of transmitral flow (-0.20, P = 0.008), E/A ratio of transmitral flow (-0.18, P = 0.02), CHA2DS2-VASc score (-0.15, P = 0.04), and BNP plasma level (-0.32, P = 0.002). Multivariate analysis revealed that PA-TMF (standardized partial regression coefficient, -0.17; P = 0.03), a' velocity (0.24, P = 0.004), and LAD (-0.20, P = 0.01) were independent predictors of LAA-FV (multiple correlation coefficient R, 0.44; P < 0.001).Parameters of atrial remodeling, ie, decreased a' velocity, increased LAD, and PA-TMF during sinus rhythm may be useful predictors of LA blood stasis in patients with nonvalvular PAF. LAA-FV can be estimated using these TTE parameters instead of TEE.

UI MeSH Term Description Entries
D008297 Male Males
D008875 Middle Aged An adult aged 45 - 64 years. Middle Age
D008943 Mitral Valve The valve between the left atrium and left ventricle of the heart. Bicuspid Valve,Bicuspid Valves,Mitral Valves,Valve, Bicuspid,Valve, Mitral,Valves, Bicuspid,Valves, Mitral
D001783 Blood Flow Velocity A value equal to the total volume flow divided by the cross-sectional area of the vascular bed. Blood Flow Velocities,Flow Velocities, Blood,Flow Velocity, Blood,Velocities, Blood Flow,Velocity, Blood Flow
D005260 Female Females
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D001281 Atrial Fibrillation Abnormal cardiac rhythm that is characterized by rapid, uncoordinated firing of electrical impulses in the upper chambers of the heart (HEART ATRIA). In such case, blood cannot be effectively pumped into the lower chambers of the heart (HEART VENTRICLES). It is caused by abnormal impulse generation. Auricular Fibrillation,Familial Atrial Fibrillation,Paroxysmal Atrial Fibrillation,Persistent Atrial Fibrillation,Atrial Fibrillation, Familial,Atrial Fibrillation, Paroxysmal,Atrial Fibrillation, Persistent,Atrial Fibrillations,Atrial Fibrillations, Familial,Atrial Fibrillations, Paroxysmal,Atrial Fibrillations, Persistent,Auricular Fibrillations,Familial Atrial Fibrillations,Fibrillation, Atrial,Fibrillation, Auricular,Fibrillation, Familial Atrial,Fibrillation, Paroxysmal Atrial,Fibrillation, Persistent Atrial,Fibrillations, Atrial,Fibrillations, Auricular,Fibrillations, Familial Atrial,Fibrillations, Paroxysmal Atrial,Fibrillations, Persistent Atrial,Paroxysmal Atrial Fibrillations,Persistent Atrial Fibrillations
D012189 Retrospective Studies Studies used to test etiologic hypotheses in which inferences about an exposure to putative causal factors are derived from data relating to characteristics of persons under study or to events or experiences in their past. The essential feature is that some of the persons under study have the disease or outcome of interest and their characteristics are compared with those of unaffected persons. Retrospective Study,Studies, Retrospective,Study, Retrospective
D012307 Risk Factors An aspect of personal behavior or lifestyle, environmental exposure, inborn or inherited characteristic, which, based on epidemiological evidence, is known to be associated with a health-related condition considered important to prevent. Health Correlates,Risk Factor Scores,Risk Scores,Social Risk Factors,Population at Risk,Populations at Risk,Correlates, Health,Factor, Risk,Factor, Social Risk,Factors, Social Risk,Risk Factor,Risk Factor Score,Risk Factor, Social,Risk Factors, Social,Risk Score,Score, Risk,Score, Risk Factor,Social Risk Factor
D013614 Tachycardia, Paroxysmal Abnormally rapid heartbeats with sudden onset and cessation. Paroxysmal Reciprocal Tachycardia,Paroxysmal Reciprocal Tachycardias,Paroxysmal Tachycardia,Paroxysmal Tachycardias,Reciprocal Tachycardia, Paroxysmal,Reciprocal Tachycardias, Paroxysmal,Tachycardia, Paroxysmal Reciprocal,Tachycardias, Paroxysmal,Tachycardias, Paroxysmal Reciprocal

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