Fig. 26From: Imaging in Transcatheter Aortic Valve Replacement (TAVR): role of the radiologistAortic annular measurement by (a) transthoracic echocardiograpy: parasternal long-axis view with measurement shown. b Transesophageal echocardiography (TEE): long-axis view shown with annular measurement. Transthoracic echocardiography (TTE) typically underestimates the aortic annulus by approximately 1.0–1.5 mm when compared to TEE or MDCTBack to article page