i am 21 years old and i was diagnosed with sinus tachycardia, i am taking beta-blockers to treat this. my question is why does my heart start racing all of a sudden. it happens when i don't make any effort at all, all i do is sit and watch a movie for example and my heart starts racing and starts beating really hard (like it's jumping out of my chest). i had a ekg holter put on and i caught one of those moments, i practically had about 70-80 beats per minute and then all of a sudden my heart started racing and it went up to 100 something and thats how it is all the time. this happens to me at least once a day without making any effort. i haven't had any alchool or caffeine in the last 3 months so that can be ruled out.
i had a thyroid test done and it's not that. i also had numerous ekgs done and they found nothing. i've seen a few doctors and they told me its nothing dangerous and they sent me home
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