Is there a link between flossing and infective endocarditis?

Yes, per current inf. Current info does substantiate such a periodontal cardiac relationship. Flossing is important in maintaining proper periodontal health.
Has not been proven. Interesting question. There has been speculation linking the two, with the idea being that bacteria sent through the blood stream could wind up colonizing on a remote surface, such as a heart valve, but to date it has never been proven that this occurs. I'd keep flossing and keep those teeth and gums as healthy as possible. It's good for your general health.

Related Questions

Is there much of a link between flossing and/or using mouthwash and infective endocarditis?

Good oral hygiene. We know there is a link between gum disease and heart disease. It sounds like you might be practicing good oral hygiene habits. For that i commend you. If you don't have a problem endocarditis then the procedures should affect you. If you do have a problem then the likelihood of them causing a problem, in my opinion, is very minimal. Read more...
No. For the most part, flossing and mouthwash use would lower the chances of endocarditis by keying less infection in your mouth. Bacteremia, an large influx of bacteria, is caused usually. By a more traumatic act, like a tooth extraction. Read more...