Left Atrial Appendage Anatomy
Left atrial appendage function. The left atrial appendage laa is a derivative of the atrial primordium that has anatomical and physiologic variations from the left atrium la which is an extension of the embryological pulmonary vein pv bud.
Background transesophageal echocardiography tee is the diagnostic modality of choice for visualizing the left atrial appendage laa.
Left atrial appendage anatomy. A major endocrine organ it mainly produces anp atrial natriuretic peptide supply inside the heart. It is proximal to the unfastened wall of the cardiac chamber known as the left ventricle. Left atrial appendage anatomy and function.
This study defined the morphology of the laa in normal autopsy specimen hearts and considered the implications of these findings for tee studies. It acts as a reservoir for the left atrium of the heart. Short term response to sustained atrial fibrillation m weigner s katz p douglas and w manning department of medicine cardiovascular division and the harvard thorndike laboratory of beth israel deaconess medical center 330 brookline avenue boston ma 02215 usa.
Percutaneous left atrial appendage laa closure represents a complementary option and effective treatment for patients at risk of thromboembolism especially in patients for whom it may be difficult to achieve satisfactory anticoagulation control or where anticoagulation treatment is not possible or desirable. It is a finger like projection from the main body of the la. The junction is fairly well defined by a narrowing at the orifice of the appendage.
Laa appears as a windsock in appearance. The left atrial appendage laa is a pouch like projection from the main body of the left atrium lies in the atrioventricular sulcus in close proximity to the left circumflex artery the left phrenic nerve and the left pulmonary veins. The laa derives from the primordial left atrium la which is formed mainly by the adsorption of the primordial pulmonary veins and their branches 6.
Left atrial appendage anatomy.
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