Challenges in the evaluation of aortic stenosis: A guide to multimodal imaging.

Severe Aortic stenosis (AS) is characterised by a late peaking crescendo-decrescendo systolic murmur and a diminished/absent second heart sound. Echocardiographic assessment of AS severity, based on transvalvular velocities / pressure gradients and calculated aortic valve area (AVA), confirms the diagnosis and allows timely intervention. Nevertheless, diagnostic uncertainty exists in cases of discordant measurements, confounders, and symptoms-measurement discrepancies. This guide outlines an approach to the use of multimodal imaging in the diagnosis and staging of AS.

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