Key result
CT-based aortic annulus measurement by planimetry showed the strongest correlation with intraoperative measurements (r = 0.951), followed by 3D TEE (r = 0.917).
Why the study?
Do preoperative noninvasive measurements (CT and TEE) accurately correlate with intraoperative measurements of the aortic annulus in patients with aortic valve stenosis?
Observational (n=30)
Do preoperative noninvasive measurements (CT and TEE) accurately correlate with intraoperative measurements of the aortic annulus in patients with aortic valve stenosis?
Effect estimate: r = 0.951 for CT planimetry
CT-based aortic annulus measurement by planimetry provides dimensions most similar to direct intraoperative measurements, supporting its use for precise preoperative sizing.
CT planimetry correlates most closely with intraoperative aortic annulus size; hypothesis-generating before guiding TAVR sizing.
BACKGROUND preoperative assessment of aortic annulus diameter is essential for sizing of aortic valve especially in patients planned transcatheter aortic valve replacement. Computed Tomographic (CT) and echocardiographic measurements of the aortic vary because of elliptical shape of aortic annulus. This study was undertaken to compare the measurement of aortic intraoperatively with preoperative noninvasive methods in patients undergoing aortic valve replacement. AND METHODS annulus diameter was measured with cardiac CT and Transesophageal Echocardiography (TEE) prior to open aortic valve in 30 patients with aortic valve stenosis. In CT, aortic annulus dimensions were measured in coronal plane, sagittal plane and by planimetry. Both 2-dimensional and 3-dimensional TEE were used. These were compared with measurements done by valve sizers and Hegar dilators. Pearson analysis was applied to test for degree of . in coronal and sagittal oblique plane tends to overestimate the diameter of aortic annulus when compared with measurements (coefficient of relation, r = 0.798 and 0.749, respectively). CT measurements in single oblique showed a weaker correlation with intraoperative measurements than 3D TEE and 2D TEE (r = 0.917 and 0.898, ). However, CT measurements by planimetry method were most correlating with the intraoperative measurements (r = 0.951). investigations with 3-dimensional views (CT-based measurement employing calculated average diameter by planimetry and 3-dimensional TEE) showed better correlation with intraoperative measurement of aortic . CT-based aortic annulus measurement by planimetry seems to provide adequate dimensions most similar to operative .
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Hinduja et al. (2016) conducted an observational in Aortic valve stenosis (n=30). Preoperative noninvasive measurements (CT and TEE) vs. Intraoperative measurements (valve sizers and Hegar dilators) was evaluated on Correlation of aortic annulus diameter measured by CT and TEE with intraoperative measurements (r = 0.951 for CT planimetry). CT-based aortic annulus measurement by planimetry showed the strongest correlation with intraoperative measurements (r = 0.951), followed by 3D TEE (r = 0.917).
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