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Left atrial enlargement (LAE) or left atrial dilation refers to enlargement of the left atrium (LA) of the heart, and is a form of cardiomegaly. Signs and symptoms
The left atrial volume is commonly measured by echocardiography or magnetic resonance tomography.It is calculated from biplane recordings with the equation: = where A4c and A2c denote LA areas in 4- and 2-chamber views respectively, and L corresponds to the shortest long-axis length measured in either views.
Atrial enlargement refers to a condition where the left atrium or right atrium of the heart is larger than would be expected. It can also affect both atria. It can also affect both atria. [ 1 ]
Dilated cardiomyopathy is when the muscle walls of your heart become stretched and can’t pump blood properly. It can be caused by inherited genes, chronic conditions, and unhealthy lifestyle habits.
Dilated cardiomyopathy is the most common type of cardiomegaly. In this condition, the walls of the left and/or right ventricles of the heart become thin and stretched. [29] In the other types, the heart's left ventricle becomes abnormally thick. Hypertrophy is usually what causes left ventricular enlargement.
The electrocardiogram often shows sinus tachycardia or atrial fibrillation, ventricular arrhythmias, left atrial enlargement, and sometimes intraventricular conduction defects and low voltage. When left bundle-branch block (LBBB) is accompanied by right axis deviation (RAD), the rare combination is considered to be highly suggestive of dilated ...
The left atrial appendage can serve as an approach for mitral valve surgery. [16] The body of the left atrial appendage is anterior to the left atrium and parallel to the left pulmonary veins. The left pulmonary artery passes posterosuperiorly and is separated from the atrial appendage by the transverse sinus. [17]
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