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Study of left atrial appendage function in nonrheumatic atrial fibrillation by TEE

WU Changju

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Abstract

Objective Left atrial function in nonrheumatic atrial fibrillation was evaluated with multiplane transesophageal echocardiography(TEE). Methods In 30 normal subjects and 30 patients with chronic nonrheumatic atrial fibrillation (NRAF), the maximal diameter, the maximal and minimal areas during a cardiac cycle and the peak emptying velocity of the left atrial appendage(LAA) were measured in the basal short axis view. The patients with NRAF were classified into two groups according to the presence of LAA thrombus and/or spontaneous echo contrast(SEC). Results LAA dilatation and poor contraction were found in NRAF patients, especially in those with LAA thrombus and/or SEC. Conclusions The assessment of LAA function by TEE may be helpful to identify subgroups of patients with AF with an increased risk of thrombus formation.

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What this paper is about

Objective Left atrial function in nonrheumatic atrial fibrillation was evaluated with multiplane transesophageal echocardiography(TEE). Methods In 30 normal subjects and 30 patients with chronic nonrheumatic atrial fibrillation (NRAF), the maximal diameter, the maximal and minimal areas during a cardiac cycle and the peak emptying velocity of the left atrial appendage(LAA) were measured in the basal short axis view. The patients with NRAF were classified into two groups according to the presence of LAA thrombus and/or spontaneous echo contrast(SEC). Results LAA dilatation and poor contraction were found in NRAF patients, especially in those with LAA thrombus and/or SEC. Conclusions The assessment of LAA function by TEE may be helpful to identify subgroups of patients with AF with an increased risk of thrombus formation.

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Available abstract

Objective Left atrial function in nonrheumatic atrial fibrillation was evaluated with multiplane transesophageal echocardiography(TEE). Methods In 30 normal subjects and 30 patients with chronic nonrheumatic atrial fibrillation (NRAF), the maximal diameter, the maximal and minimal areas during a cardiac cycle and the peak emptying velocity of the left atrial appendage(LAA) were measured in the basal short axis view. The patients with NRAF were classified into two groups according to the presence of LAA thrombus and/or spontaneous echo contrast(SEC). Results LAA dilatation and poor contraction were found in NRAF patients, especially in those with LAA thrombus and/or SEC. Conclusions The assessment of LAA function by TEE may be helpful to identify subgroups of patients with AF with an increased risk of thrombus formation.

Key concepts: Medicine, Cardiology, Atrial fibrillation, Internal medicine, Thrombus, Appendage, Atrial Appendage, Cardiac cycle

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