I’m a 79 year old active male in generally good health. Had a pacemaker implanted a little over four years ago to deal with a slow heart rate (low 40s), a-fib and a-tach. Most recent nuclear stress test showed slightly enlarged heart, good heart function, 55% ejection fraction. During the past year, pacemaker tracings disclosed six very brief episodes of non-sustaining v-tach, longest 5.6 seconds. What are my options?