Bad experience on a tour.
Hi: I want to share with you a bad experience I had last week.
My wife and I were on a guided tour through Italy. For those not familiar with this, over there guides provide their "flock" with radio receivers walky-talky like, so that the guide proceeds with his/her explanations and the group gets the info even if they get mixed, as they usually do,with another crowd of tourists. I was given one of these things, hung it round my neck and we proceeded on a short slope towards the ruins of Pompeii. After a few steps, I felt a very strong discomfort and had to stop, almost out of breath.I reacted quickly, shut off and pocketed the receiver and my PM soon returned to normal, and I was able to follow the guide. (Incidentally, we had to call off the rest of the Pompeii tour due to a heavy downpour that drenched us all).
Well, I don't know how radio waves can interfere with pacemakers, but they certainly did.
I leave to our experts in electricity and waves to give an explanation, if there is one.
All the best.