When to intervene in aortic stenosis?

Aortic stenosis is increasingly common and currently managed either by surgical valve replacement (SAVR) or TAVI. The question is when to intervene? Yes, aortic stenosis should be severe, but are symptoms a requirement as most Guidelines still argue? Or should we just consider the hemodynamic severity? Here is a first attempt to answer this question - provocative, but looking to the future.
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