Does fusing Doppler and MDCT data to calculate AVAi improve the reclassification of severity in patients with low gradient severe AS with preserved LVEF compared to 2-dimensional echocardiography?
Fusing Doppler and MDCT data to calculate AVAi significantly reclassifies a large proportion of normal flow-low gradient and low flow-low gradient severe AS into moderate AS by providing a true cross-sectional LVOT area.
AIMS: Low gradient severe aortic stenosis (AS) with preserved left ventricular ejection fraction (LVEF) may be attributed to aortic valve area index (AVAi) underestimation due to the assumption of a circular shape of the left ventricular outflow tract (LVOT) with 2-dimensional echocardiography. The current study evaluated whether fusing Doppler and multidetector computed tomography (MDCT) data to calculate AVAi results in significant reclassification of inconsistently graded severe AS. METHODS AND RESULTS: . CONCLUSION: The fusion AVAi reclassifies 52% of normal flow-low gradient and 12% of low flow-low gradient severe AS into true moderate AS, by providing true cross-sectional LVOT area.
Kamperidis et al. (Mon,) studied this question.
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