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diagnosis or treatment for my 15 year old with tachycardia.
My 15 year old has extremely high heart rates regardless of what she is doing. We are under the care of a cardiologist and have had echo and ekg's done. svt & pots ruled out. stress test done in June & found issue but no diagnosis. Her bp dropped to 82/49 her heart rate at 218. Takes salt daily. She was also cleared to participate in color guard/ marching band. As the competition season continues the following is happening,, she will stay between 189 and 220 for the 15 minute program. Then after ward is very dizzy and short of breath and sometimes extremely zoned out or confused. When they have prelims and finals the same day by the end of the finals her blood pressure is low and catching her breath is sometimes impossible. Then for the next 24 to 72 hours she feels like a train has hit her and is dizzy. The newest symptoms: Her legs feel like jelly & chest tightness. She is not critical enough for the cardiologist to give it much attention. ..
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There are two types of sinus tachycardia: normal and inappropriate. Normal sinus tachycardia is a temporary response to a specific factor. Inappropriate sinus tachycardia, on the other hand, has no known cause and can result in an increased heart rate even when resting.
https://www.medicalnewstoday.com/articles/327091
Dysautonomia, Lyme, thyroid, cortisol, hormones (adolescent hormones can fluctuate), mold, eating disorder, POTS (this can be ruled out mistakenly). Nothing structurally wrong with the heart.
You said EKG's were done and no notice by MD but at the same time you yourself cite low bp and high heart rate regardless of what she is doing. Did the cardiologist get your numbers? Are they from a smartwatch? I am confused.
Again suggest functional or integrative medicine. Maybe endocrinologist and/or gynecologist. Infectious disease is better handled with functional medicine in our experience. PCP can do Lyme test but get a Western Blot, not an Elisa and even one Lyme specific band is suspicious regardless of stated result (lymenet, org).
Strongly suggest she give up color guard/marching band while this is investigated. (Is her instrument heavy?) I am surprised she was cleared after that stress test: did the MD ignore those results? Again I don't get it.
It is hard to give up an activity that she loves: my kid with health issues gave up activities in high school and those losses are barely remembered now.