M.S.
My Mother is 98 and had a pacemaker placed 4 years ago, was done as outpatient, home the same day. It is placed in small incision in the chest above breast, below collar bone. Soreness lasted a few days, but they will give pain pills if needed, may have some bruising, but will heal up fine. Sometimes the bra strap or seat belt in car will need some padding over the area.
It didn't slow her down much except soreness in moving her arm and had to be careful during sleep, but by two weeks, minimal discomfort and healed.
The follow up is a "check" over the phone every three months, the cardiologist will arrange the kit / machine, which requires a land line phone, not cell phone and not cordless. Then the Dr. will tell you when she needs to be seen..
My Mom at 98 sees her cardiologist every 6 months to a year, and the pacemaker has never been a problem.
They will give teaching and training materials at time it is placed.
M., RN