I am a 70 yr.old man with a history of slow heart rates. 48 at rest, 75 while walking, 80-90 while playing tennis, 108 maximum on last year's stress test, and 30-40 while sleeping. I have no chest pains, shortage of breath, or blackouts. I am taking medication for high blood pressure (2 years) and cholesterol (3 years). The results for the two above are good. I don't smoke, but enjoy two beers daily (during supper and early evening). To my best knowledge my low heart rate could go back 10 years or so; about the same as above. I did a great deal of running during the late 70's and a great deal of tennis in the 80' and 90's. Now I enjoy throwing the javelin daily during Spring through Fall. My work outs are generally 45 min. to an hour. Some running for short distances are required during these workouts. I am scheduled for another stress test later this month; moreover, I will be taking a MRA next week in the head area. Am I due for a pacemaker now, or will I need one at some point in the future? Should I be worried now or should I be concerned in 2-10 years. Please help!! Thanks, K.