I have Postural Orthostatic Tachycardia Syndrome (I worry I don't because i've been diagnosed without the title table test but my heart goes up 30 beats upon standing always). I am on Propranolol and have been having a weird symptom lately.
Ill be sitting and my hearts 60 then ill stand and its 110 then within seconds of it going that high it immediately drops back down to around 80. I worry about this because I can't imagine it racing and then dropping that much in less than 4 seconds is okay.