Hello!
Welcome and thank you for asking on HCM!
I read your question carefully and understand your concern.
I agree with her doctor in the fact that based on her cardiac tests, we can exclude a cardiac disorder related to this symptomatology.
I would recommend consulting with a
neurologist for a careful physical examination and a prolonged EEG, coupled with ECG. These symptoms may be related to
epilepsy seizures. You should know that epilepsy seizures are commonly related to
tachycardia. The twitching in her legs may be another sign of the seizures. Even the fact that she feels tired and wants to sleep after these episodes is another argument in favor of seizures.
Further lab tests (
complete blood count, liver and kidney function tests,
thyroid hormones, calcium plasma levels, blood electrolytes, fasting glucose,inflammation tests, etc.) may be necessary to exclude metabolic and inflammatory disorders that may cause a similar clinical scenario.
Hope to have been of help!
p.s.: You do not need to pay for public questions, so don't worry about it.
Best wishes,
Dr. Iliri