Interesting. Thanks for the links.
That is pretty thin evidence at this point. There may be some hope there for the future, but right now there is no HDL treatment for aortic stenosis for humans that is approved. While higher HDL is associated with better cardio vascular health, studies using pharmaceuticals to raise HDL, thus far, have proven to have no health benefit.
"Conclusion
Increasing HDL levels via pharmacological manipulation beyond optimal lipid lowering therapy for secondary prevention is not beneficial."
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3984171/
If you want to raise your HDL naturally, that could be a benefit to your health in general. One of the best ways is to increase your amount of exercise to raise your HDL. Which, we all should be doing anyway, regardless of whether we have aortic stenosis. Although, with severe AS, make sure to get you doctor's approval first- he may not want you to do more than brisk walking, but this is actually still very beneficial.
Here is info from the Mayo Clinic on ways to raise your HDL. Some may find it surprising that moderate drinking raises HDL. Some have speculated that this is why moderate drinking has correlated with lower cardio vascular events, in many studies.
https://www.mayoclinic.org/diseases...esterol/in-depth/hdl-cholesterol/art-20046388
Ultimately, raising your HDL could benefit your health in general, as it is correlated with lower cardio vascular events. But, I see nothing there to bank on in terms of reversing aortic stenosis, at least not at this time, and, certainly, not an alternative to surgery when one has symptomatic severe aortic stenosis.