Yes they can be slowed down or even stopped by medications such as beta blockers or other antiarrhythmics, but the problem is that these medications can cause further slowing of you slow heart rate and worsening of your apathy and general lack of energy, Hence you need both these medications to slow down the fast rates and the the pacemaker to prevent the slowing of the heart rate any further.
Your hx certainly sounds like mine, except I'm eight years older than you. I was extremely nervous about a pacer, and fought it for a year, even though I had Brady-Tachy Syndrome. I have had three MI's, and eight stents.
Having a Pacer inserted was the best decision I ever made. Since having a pacemaker inserted, I've had a huge surge of energy. Procede with confidence, it will change your life.
Get tested for heavy metals-lead, mercury, palladium,etc. A detox using the Master Cleanse method is helpful and a homeopathic doctor with an electro-dermal testing computer. My husband was told that his life was in danger unless he had an ICD implanted in his chest. The heart doctors refused to approve the test for heavy metals so we found an alternative dr. It has been about 4 years and he is doing great! No more episodes of VT but he does get A-fib if he eats food with MSG in it. We try hard to avoid it by calling restaurants ahead of time and cooking from scratch as much as possible.