Virginian - As you know, I have had a pacemaker since just a few days after my valve replacement just over 2 years ago. While I'm not an avid "home shop" hobbyist, I have used many electric hand and bench tools since the pacer. I also work as an executive in a metal stamping factory. I am in the plant daily, walking and working among machines like punch presses (up to 600-ton), coil winding machines, multi-slide and four-slide forming equipment, tool and die shop equipment (including wire EDM, welders, grinders, mills, lathes, etc.) and all sorts of high-voltage electrics (up to 480 volts), as well as computers and office electronics. I am also a ham radio operator, and regularly operate a modest ham station with a short-wave radio transmitter power level of 100 watts (compared to the 1/10 watt or less for a cell phone) - ALL WITH NO ISSUES. I did check with the manufacturer of my pacemaker about the ham radio transmitter, and their tech support people knew all about what I wanted to do. They said that at the frequencies I operate, I would be safe even with many times more transmitter power than my 100 watts. Once I heard that, I just went back to my life and haven't looked back. I imagine you can do the same. If you have any doubts, make a list of the tools you want to operate, and call customer/tech support at the manufacturer of your pacemaker and ask them if you need to worry. The folks at Boston Scientific (manufacturer of my pacemaker) were most helpful and were able to put my fears to rest very quickly. I think of it this way. . . "If the manufacturer of my pacemaker says not to worry about something, I won't disagree with them. After all, they designed it."
I do have to admit to having one "issue." When I was running a small handheld random-orbital polisher, I noticed that my heart rate was racing. It turned out that the vibration of the polisher was being transmitted from my hand and arm to my chest. My pacemaker "thought" I was bouncing up and down rapidly, as in running, and it revved up my heart to allow me to run. Lesson learned - use the polisher with the other hand. No lasting or real harm, just a surprise. Looking back on the event, it was scary for about 10 minutes, until I figured it out. Now it seems funny.