I've had a Pacemaker for over 30 years. Initially I showed my card & asked for a patdown. But in recent years, I just go through like normal with no issues. HOWEVER - lately I've noticed signs that say to inform TSA agent if you have a PM. If you do, they put you through the other scanner where you hold hands overhead for 3 seconds, then do a brief body scan.

Funny story though - last week flying out of JFK, shockingly there was no wait at Precheck line. THe Agent waved through several people in front of me, but then when it was my turn to go thru the detector she said "Do you have a pacemaker or other impanted device?" WHY ME! I said "Do I look that old & frail?" We laughed together, and then she told me that she recently had a 10 year old go thru with a pacemaker. BUT it sure did make me feel old!