This isn't sinus tachycardia because it doesn't behave as such. It is more likely an SVT either coming from the atria or the AV node. Your cardiologist will probably recommend an EP study which is very effective in obtain a diagnosis. In addition, at the same time, you can have an ablation procedure which depending on the type of tachycardia can have up to a 98% cure rate.
My Dr. said the the Cardiologist said my treadmill test was "normal". What is normal about a heartrate leaping from 145BPM to 173 in less than 3 seconds? He read the cardiologists report which said "normal sinus tach". I KNOW something is wrong with how my heart is responding to exercise. Ant thoughts on what next?
I don't know whether this is helpful or not, but I have noticed on bicycle rides on the road that my heartrate does a somewhat similar thing. I am 60 and have been riding for 35 years. "Rides" consist of 40 to 60 miles of road riding that puts my heart rate at 130 to 145 during the initial 1 to 2 hours. I have noticed in that last hour that its difficult to keep the rate below 150 and it often exceeds 160 with what I consider fairly moderate exertion. I have considered dehydration to be a cause but don't think its solely responsible as I do try to take a lot of fluids. I quit worrying about it and just ride home.
Will I be able to exercise again? What is normal recovery time after ablation? Should I exercise now? My tech at the Treadmill test said it was "still in Sinus" as he was monitoring the increase in HR. Was he wrong?
My Dr., before the Stress tes,t said it sounded like paroxysmal tachycardia? He said I could take a beta blocker at time of event. Is that another type of treatment?