I hear your concerns and can feel them . I was 65 when I got the pacemaker and just the thought of being dependent on a pacemaker scared me . I am a nurse and my concern was my atriums are in a fib and my ventricles are working only on a pacemaker .but when I consider the last 5 years and the hell I went thro with not feeling good . Now I feel good and it’s not perfect . But it does get BETTER . All the same thoughts . What if the pacer fails me . But in 40 years of nursing I have never seen a failed pacer . So you hang in there and get thro the adjustment time and text me for support . No you won’t be anxious all your life .. this too wi ll pass . I named my pacemaker Wilson . Lol