Yeah there's not much I've found in relation to studies of valve calcification related to low magnesium, I have seen it mentioned often. The third link is to someone's own site relating to connective tissue disorders which mentions the oddity of people with low magnesium levels getting illnesses with symptoms similar to that caused by connective tissue disorders. For them the illness and symptoms go away with correcting the magnesium levels, whereas the ctd symptoms people usually don't have a deficiency and increased magnesium levels don't help them.
The second link offers an analogy:
“To understand how you can create a calcium/magnesium imbalance in your own body, try this experiment in your kitchen. Crush a calcium pill and see how much dissolves in 1 oz of water. Then crush a magnesium pill and slowly stir it into the calcium water. When you introduce the magnesium, the remaining calcium dissolves; it becomes more water-soluble. The same thing happens in your bloodstream, heart, brain, kidneys, and all the tissues in your body. If you don’t have enough magnesium to help keep calcium dissolved, you may end up with calcium-excess muscle spasms, fibromyalgia, hardening of the arteries, and even dental cavities. Another scenario plays out in the kidneys. If there is too much calcium in the kidneys and not enough magnesium to dissolve it, you can get kidney stones.”
It makes sense to me that calcium/magnesium imbalance in blood may cause calcification in body tissue. I imagine its quite different from house plumbing to human plumbing however chemicals in the fluids due influence calcification in home plumbing for sure. To me it makes sense to try and maintain some balance, otherwise illness does seem to result from low magnesium anyway. Supplements aren't my thing but i plan on making sure I add sufficient magnesium from foods such as cereal,fish,bananas,almonds,etc... Which seems to be in line with an alkaline rich diet I want to have anyway.
However, one of the big reasons I choose bovine valve in first place, was that I believe I'm not a stable diet type of person and would most likely end up as a high stroke risk with a mechanical valve because of it. I'm going to try and start a sensible diet anyway. I doubt adding magnesium rich foods to diet would hurt too much, may even help the Lazy Bowel Syndrome I was diagnosed with immediately after surgery and realized in hindsight that it probably troubled me most of my life often. I know when i first changed to adding those foods three years ago, alot of horrible symptoms like extremely tight muscles,headaches, dizziness, chronic fatigue, dry itching skin,etc, did go away. Whether it was higher magnesium, lower acid ash, I could never be certain what cured me.
If you do ever happen to come across any GOOD studies, I would be interested in the findings.