Centrum multivitamins just don't have that much calcium to be a concern to begin with, even if there were a reason to be concerned with calcium. You need calcium to maintain your bones, sugar levels, and and general health, and your heart actually needs calcium in order to beat properly.
To my knowledge, there is no science to show that calcium intake affects valves (original or replaced). Because of this, valve manufacturers have been warned on several occasions not to suggest that calcium intake might affect the functional life of their valves, or suggest that their clients should reduce their calcium intake.
Calcium is only one of the minerals that are deposited onto valves in what is simplistically referred to as "calcification." The deposits actually include most or all of the minerals the body uses to build bones or teeth, which together form a mineral called apatite. There are various yet-unproven theories as to why the body deposits this bony concretion on the valve and surrounding area. Among others, these include thoughts like the body recognizing damaged valve tissue and trying to coat it protectively, or the body perceiving of the valve as a foreign object and trying to coat it to make it neutral, or having a disfunctional b allele in the gene that controls how vitamin D metabolizes calcium, which then allows blood-carried minerals liberated from the bones to freely deposit.
A lot of health admonitions that seem to make sense don't turn out to be true at all in real life. Calcium supplementation damaging valves is one of them. Assumptions are everywhere in medicine, based on what appears to be common sense, but turn out under scrutiny to just not be the case. Studies of the actual results of these sensible-seeming illusions are fascinating. The little alcohol swabbing they do on your arm before you get a shot actually prevents nothing in real life. Premedication by valve recipients before dental work cannot be traced to any reduction in those patients' chances of developing infectious endocarditis. Antibiotics will not cure 98% of children's earaches (most are caused by viruses). Yet most clinics still swab arms, most cardiologists still prescribe premedication antibiotics, and many pediatricians still prescribe antibiotics for earaches. And most patients still expect and demand these things.
The amount in a Centrum or similar multivitamin shouldn't cause you amny problems. If excess calcium were the cause of stenosis-causing deposits, there would be many more of us here on this forum, and they'd already have found a way to stop it from happening.
Best wishes,
