The echocardiographic image shows measurement of the ascending aorta, identified by its position above the aortic valve and before the arch vessels. The ascending aorta is a critical region assessed for dilation or aneurysm.
The sinus of Valsalva refers to the dilated portion just above the aortic valve cusps, while the aortic root includes the annulus, sinuses, and sinotubular junction. The descending aorta is posterior and visualized in other windows.
This measurement and its importance are detailed in the "Textbook of Clinical Echocardiography, 6e", Chapter on Aortic Root and Ascending Aorta Evaluation【20:380-385†Textbook of Clinical Echocardiography】.
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