Dee:
Always carry meds & med devices with you. Have a friend who's a diabetic; she puts her supplies in carry-on luggage, never been questioned. RN who trained me on my ProTime told me to always carry my machine in carry-on.
I've flown maybe 10 times since my surgery. Only been searched one twice -- (1) Security at Kansas City MO, unlike other airports, didn't tell passengers to take shoes off and (2) the medical alert necklace I used to wear apparently set off the detectors in St. Louis in mid-October. Two weeks later, same necklace, no problem. Go figure.
Wiring in chest does not set off detectors. At least not at this time.
Some airports require more time to get through security, depending on whether each terminal has many security points or one or two for the whole terminal. And it depends on what time of day/day of week/season. If the airport has curbside check-in, that speeds things along. You run the risk of TSA doing a luggage check, sealing the luggage with plastic ties. I put a Swiss Army knife in an outside pocket when I check my TravelPro; have had to use it to cut off the plastic tie before.