Seems a pacemaker doesn't show any problems with RC;
http://www.helifreak.com/showthread.php?t=402353
Also, the fifth point made in
this article from AHA says that household items like radios won't bother it. heck, I wouldn't even think WiFI signals would disrupt it! Especially because 2.4 GHz has less power than an oven, and ovens are fine to use.