Hi,
Based on the information you provided, I would look toward diagnosing an occult
arrhythmia which could be detected by Zio monitoring. Also this diagnosis could be coronary vasospasms which are difficult to detect, have you consulted an electrophysiologist? I have seen POTS usually as a result of another underlying disorder. You should shots triggers for these conditions such as
dehydration, caffeine, alcohol, decongestants, tobacco, etc.
What symptoms do you experience during these episodes? Do you get
headaches or profuse sweating? This would prompt a work up for a rare condition called a
pheochromocytoma. There are many possibilities but I would recommend electrophysiology and internal medicine consults.
Hope I have answered your query. Let me know if I can assist you further.
Regards,
Dr. David Hoch, Internal Medicine Specialist