Abstract
Severe aortic stenosis (AS) is typically characterized by small valve area and high gradient (≥40 mm Hg or peak aortic jet velocity of ≥4 m/sec). However, some patients with severe AS based on valve area have low (discordant) gradients, despite normal left ventricular ejection fraction (LVEF) and flow, confounding diagnosis and treatment. In this multicenter study, investigators reviewed echocardiographic and computed tomographic (CT) scans …
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