Well, I agree in that this is an excellent question. The first thing is that Chronic infection of any origin is impacting on all your organ systems because of two things. First, the chronic presence of an undesirable bacteria implies the numbers of that bacteria become highly elevated (their populations multiply extremely fast) and your body will launch a Response (which is damaging in and of itself) to the infection that will be as Chronic as the Infection itself. It's not long before we can be pretty sure that the bacteria are present in your vascular system and that means travelling through your heart's chambers and valves. So, again, it's a question of how long the infection, how many bacteria and where are they lodging or colonizing and has the immune response controlled the situation or not? If You want to eliminate the worry come in to your Dentist's office and fix it, ie-take care of the tooth or remove it, by all means do so, and replace it with healthy structure. If you do, It will benefit your mouth and your heart as well as your overall sense of 'fitness'.