I've flown a couple of dozen times since surgery, and I'm sorry to report that I don't set off any detectors. I've passed through a couple of whole body scanners, don't know which type, and not been asked a think about my wires or my valve. Even the arches don't see my wires (with the mechanical valve being carbon, the arch wouldn't detect it anyway). Since I'm always metal free before passing through the arch, I've never been wanded but I I suspect the wand might catch the wires.
One other surprising thing, is that I travel with my Coaguchek XS in carry-on, and I've only been asked to show it and say what it is once, from all those flights. I also have a bad habit of carrying several different dosages of warfarin with me. ( I like to take the same amount every day, and have been know to adjust on occasion when I fall out of range but I really don't need five different doses on a trip!) I've never even had them look at the pill bottles to see if my name is on them, much less look inside them.
I had a lot more trouble back when I had nothing suspicious with me, but my goatee was still black. Going gray seems to have it's advantages!