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Background Bicuspid aortic valve (BAV) is the most common form of congenital heart disease and 30-50% of BAV have an associated aortopathy. Accurate aortic measurements are therefore particularly important in these patients. Two-dimensional echocardiography (2DE) is typically used to follow the aortic size in these patients; however, cardiovascular magnetic resonance (CMR) offers the potential advantage of 3-dimensional datasets that can be used to make more accurate measurements. Intertechnique differences in aortic measurements for BAV patients using these techniques has not been extensively studied. Our aim was to evaluate the measurement variability associated with each technique and their mutual agreement in measuring the aortic root. Methods Retrospective review of patients with BAV who had both CMR and 2DE. Contrast-enhanced magnetic resonance angiography (MRA) or 3D whole-heart imaging (Philips 1.5-T scanner) combined with offline analysis with double oblique planes were used to obtain measurements of the sinus of Valsalva (SOV) on CMR (dimension 1 and 2). On 2DE, the SOV was measured on the parasternal long axis view using the inner-edge to inner-edge technique. Bland-Altman analysis was performed to evaluate the inter-technique agreement between 2DE and CMR. Intraobserver reproducibility was measured as coefficient of variation (CV) and 95% confidence intervals between repeated measurements.

journal of cardiovascular magnetic resonance

Inter-technique agreement between two-dimensional echocardiography and cardiovascular magnetic resonance imaging in the setting of bicuspid aortic valve disease