I am 53 years old and have consistently exercised most of my adult life. Last year I briefly went into afib during a stress test. A follow up 30 day monitor showed seversl more additional brief afib episodes after briskly walking for 20 minutes or so. In the worst of them, I physically collapsed and my heart rate was recorded at 230 bpm. My cardiologist put me on a beta blocker and I bought the Alivecor ECG and a fancy running watch with chest strap to monitor my heart during exercise. A few months ago I slowly weaned off if the beta blockers and have continued to closely monitor my heart rate. I find that it jumps up quickly to between 140 and 160 bpm when I briskly walk and between 160 and 180 when I do a 2 mile bike ride on level ground. This occurs within a few minutes of setting out. i can't tell if I'm in afib but when I stop to check my pulse it generally feels regular (although it is pounding).. It is after exercising that I feel lightheaded or notice skipped beats and that it takes a good 30 minutes for my heart to generally calm down but when I check my Alivecor it generally says unclassified and only occasionally has shown me to be in afib. I downloaded the last 3months of data and plotted up to look for trends and saw that this is my pattern every day (I exercise 30 min/day). I'm wondering if others find their heart rate this high as well. I don't want to damage my heart and develop heart failure but also don't like taking drugs unnecessarily. Would like to get a better idea of how normal or abnormal this is...
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