My cholesterol has always been low normal (my reports always said "you have lower than average risk"). My valve was extremely calcified. As such, I find no cause-and-effect in my personal history to back up the cholesterol theory. Sounds like similar for Dick from their post.
As statins reach their patent limits, the manufacturers must find new uses for the drugs to extend those patents, or lose their exclusive rights to manufacture and sell the drug to the hungry and ever-waiting generic drug manufacturers, who will take a very large chunk of their sales. The studies I have seen that were done around this did not do differentiations nor comparisons involving people who started out with normal or near-normal levels of cholesterol. Nor were concurrent factors tested, which might actually be more relevant than cholesterol.
I have not been happy with what I've seen so far of the statin manufacturers' lack of interest in the side effects that their drugs can produce, and the human damage that lies in their wake. There are many on this site who have attested to that. The promotion for statins has been highly aggressive, and they have lobbied extremely hard with the ACC and AHA. The latest has been in the form of in a push to lower what is considered the normal range for cholesterol for everyone.
While I don't believe that statins are useless, nor dangerous for everyone, I do believe that they should not be taken unless there is a definite need, and I am personally unconvinced regarding any potential effect on valve longevity, particularly for anyone near normal cholesterol levels.
The next time someone says to you that cholesterol (or anything else) doubles, triples, or increases your risk of stroke and heart attack, ask them from what starting risk? Ask what was the original risk level for you that is being doubled? Betcha they can't tell you...
Best wishes,