pacemaker, other than you may suffer from a low heart rate, say under 40 at rest.
If you need a pacemaker
I would bet that it will extend you life expectancy
. I don't have a number, but do recall general population statistics that say most who are alive at age 66 will live into their 80s. Thus, taking steps to prevent heart failure and to improve you quality of life seems well worth the effort for someone at age 66.