Accuracy and reproducibility of left ventricular outflow tract diameter measurement using transthoracic when compared with transesophageal echocardiography in systole and diastole

Abstract

We present the data regarding accuracy and reproducibility of LVOTd measurements by TTE when compared with TEE. LVOTd measurements at end-diastole may be helpful when systolic images are suboptimal.

Dual source multidetector CT-angiography before Transcatheter Aortic Valve Implantation (TAVI) using a high-pitch spiral acquisition mode

“…However, according to literature, variations of the annulus size during the cardiac cycle are limited [9,32], especially in patients with severe AS with severe calcifications of the aortic valve and the aortic wall and annulus. A previously published study establishing normative values for ascending aorta measurements found large inter-individual variations in diameters and distances but with limited intra-individual variations during the cardiac cycle [33].…”

Evaluation of aortic root for definition of prosthesis size by magnetic resonance imaging and cardiac computed tomography: Implications for transcatheter aortic valve implantation

“…In addition, CMR and DSCT as well as TEE measurements were not performed exactly at the same time (end-systole to mid diastole versus early-systole). However, variations of the annulus size during the cardiac cycle are limited [15,20]. In 5 patients atrial fibrillation was present.…”

Cardiac Ultrasonography in the critical care setting: a practical approach to asses cardiac function and preload for the “non-cardiologist”

“…Although CO can also be measured at other locations (mitral valve annulus [6], ascending aorta [7,8], the right ventricular outflow tract (RVOT) [9] and pulmonary artery [10]), this has been less validated. While cross section of the LVOT at diastole (LVOT d ) can also be measured [11], large inter-observer variability exists up to 0.2 cm [12]. There also exists a difference between LVOT measured by transthoracic (TTE) and transesophageal echocardiography (TEE).…”

“…There also exists a difference between LVOT measured by transthoracic (TTE) and transesophageal echocardiography (TEE). It has been revealed that TTE tends to underestimate the LVOT by 0.1 cm [12]. Variation of LVOT in the general population ranges between 18 and 22 mm [13,14] and is related to body surface area.…”