I haven't had serious dental work like Ross has had, but I have had several biopsies of my GI tract at one time and I never stopped my warfarin dose. At first the doctor talked about bridging, but I let him know that since I was going to be in a hospital during the procedure and the size of the biopsy is unlikely to cause prolonged bleeding, I was not scared at all with being fully anticoagulated. He agreed to go ahead with full ACT on board.
The medical community seems to think of ACT as some kind of voodoo drug where the blood drains dangerously fast from pin pricks or cuts while shaving. Seriously - I had a nurse instruct me to be VERY CAREFUL shaving, as if I would need a transfusion if I nicked my mug. My experience so far has been to apply pressure, and the bleeding usually stops after a few seconds. The only time I actually bled like "stigmata" was when they took a long term, large bore IV out and I didn't apply pressure long enough and the bandage was loose. Blood ended up running down my arm, but I didn't notice until I felt something wet. Applied pressure and it stopped - not a a big deal to me at all. I think my inr was theraputic at the time and I was on both Lovenox and Coumadin. Usually we're not taking two ACTs at once.
Again though, this is a super personal thing. A person could have all sorts of bleeding risks and it could be a clear no-go for ACT for them. If I had a strong family history of hemorrhagic stroke or something like that, I might look alot closer at the best tissue valve available. Same goes for current conditions with bleeding risks.
Even if pradaxa ends up being a good replacement treatment for A-fib or VTE - which really the jury is still out on - if you're lifelong anticoagulated on pradaxa, it stands to reason that, if doses are properly managed, it's similar in bleeding risk to being anticoagulated with coumadin except you don't have the 50 years of knowledge of the drug to provide insight in to how it works. What i mean to say is, we can't possibly know as much about Pradaxa as we do about Coumadin right now... at least not in my opinion. The lack of familiarity in the medical community about Pradaxa seems a risk in itself. The lack of reversal agent (that I'm aware of) is also concerning. From my perspective and to my personal situation, the only clear benefit to Pradaxa is convenience.
There are tons of reasons you could need ACT in the future. I've read that some people are on ACT just for a dacron graft, and not the valve. I know that cancer patients are extremely prone to clots, which is why you'll often find oncology and hematology doctors in the same clinic. Again, factor V leiden, where 5% of the population is thought to have it.. or protein c deficiency, protein s deficiency, anticardiolipin antibodies or lupus anticoagulant, etc etc etc. I've also read that some abdominal aneurysms can begin throwing clots in to the lower body.
Just my two cents.