To guyinva (if he's still here) and Topmommy and to whom it may concern:
If you're bothered by mech-valve noise soon after surgery, you may be interested to hear that I was bothered by my TISSUE-valve noise -- it felt like it was "beating out of my chest"!! -- for the first 2-ish weeks after my AVR surgery. I posted at the time that if I'd gotten a mech valve, I would have been blaming it for keeping me up and fairly often WAKING me up -- except it was a nice soft, quiet, flexible pig valve that was doing that! Really, I think it was my nutty heart, which has been taking its own sweet time calming down and lowering its resting heart beat post-op, and has also thrown in a lot more PVCs (premature heart-beats) than I ever had pre-op.
So it is quite likely that your mech-valve sounds will also fade, as your heart settles down into its new rhythm, and maybe even into its old one.
Also, if anybody is concerned about this issue and hasn't gotten a valve yet, there are one or two studies indicating that the Medtronics ATS mechanical valve (details on their web-site) is significantly quieter than the other 3 leading mech valves. I think atcs.jp/pdf/2007_13_3/172.pdf is probably the most substantial study on the subject, entitled "An Evaluation Study on the Quietness of the ATS Valve" by Tomofumi Umeda. The ATS web-site even presents a number of studies (and SEM micro-photographs) suggesting that the ATS valve may be BETTER than the much-vaunted On-X valve at avoiding "thromboembolic events" (aka "clot throwing"), even at lower INR levels than the On-X(!). (See atsmedical.com/Physicians.aspx?id=2470 and atsmedical.com/Physicians.aspx?id=2476 .)
So it might be a good choice in a mech valve in general (with quietness as a "bonus"!), as long as your chosen heart surgeon has it available and is comfortable with it.