I purchased a woman's electric wet/dry shaver, 3 Blade Foil Shaver. One of the blades is a trimmer that cuts longer hairs, the other two cut them short.
I had not shaved my chest in 3 or 4 days as dry shaving with the men's rotary was just not working.
I have used it 3 times now with good results. Get in a hot shower, soap up the area to be shaved, and shave. The first time I had my glasses on, but this turned out to be unneeded. There does not seem to be a risk of cutting your chest, and you can feel the area to see what needs more work. I did not do a side by side test, but the effectiveness of the wet foil shaver seems significantly better than the results of the dry shaving with the rotary.
I am settling into a routine of shaving my chest every other day. If I survive the next occurrence of defibrillator pads, I will update this answer as to the effectiveness of shaved hairs not being pulled.
With a chest that is shaved EKG leads attach to the skin better, they can removed without any discomfort.
Defibrillator pads applied at about 24 hours after shaving cause no pain when removed or repositioned. There is much better contact and almost no burns (4 defibrillation shocks). I wore the pads for 48 without discomfort from hairs getting pulled with each move that was experienced last time. There are some marks but it is hard to tell if they are very minor burns or just aggravated skin from wearing the pads so long. When the pads where removed I was about 72 hours our from my last shave it seemed like the hairs were just starting to get long enough to stick to the pads, but still no significant discomfort on pad removal.
In summary: wet shaving with a electric shaver as described above every other day provides a nearly painless experience with defibrillator pads wear and removal.