I'm 25 yrs old, 145 pounds, male, 5" 3. EKG says sinus tachycardia. My target was 175, i passed that in no time. The reason for the stress test was to see why i have the sinus tachychardia, now I'm being sent to an electrophysiologist. Because I'm in better shape than move of my friends, yet i can't walk for more than ten minutes without being out of breathe and my heart getting like it's going to burst, and they are fine like 10 minutes of waking is no big deal
when we go hiking i have to stop every half mile to catch my breathe, and relax, they make it all the way to the top of the trail and back and im still halfway with my heart bursting out my chest, going 150 - 170 bpm, and theirs is fine like they went for a brisk walk. But we're all the same age. And don't of these guys are fatter than i am. I don't smoke or drink, and have been like this since i was 20, before that i either didn't notice it, or didn't have any issues cuz i was very acting, went to the gym, played ball regularly . then this heart pounding, chest hurting shortness of breathe came along and put a stop to all that.
I'm curious why you had the stress test? I'm not a doctor, but I have read that the Maximum Heart Rate is generally considered to be 220-age.
The above Wiki page covers several formulas used for the Maximum Heart Rate. This is also, I believe, the maximum rate to be obtained during prudent stress testing and not necessarily the maximum the heart can achieve.
In any case, heart rate is also influenced by conditioning, medications, and a number of other factors, there are no absolutes. After 5 minutes to be at 210 briefly, depending on those other factors, does not sound unreasonable.
At 55, I had a stress test, reaching 75% of the expected rate. If they calculated it as 220-age, 165 would have been my target. 75% of that is 124. My most recent stress was done under my normal medication with a Beta Blocker, and after 5 minutes on the treadmill, my heart was only at 91. I stopped it at 5 minutes, my legs were giving out, and though I could have made another minute, didn't want to take the chance.
What is the nature of the abnormal EKG? Also, how long did you stay on the stress test? Are you male or femaleight by more than 20 pounds? Tall, short, average? Conditioned or sedentary? Smoke? Drug use, including prescription, supplements, caffeine? If you use illicit drugs, be sure to let your doctor know.