Postural orthostatic tachycardia syndrome is a condition in which a change of posture from laying down or sitting to standing might cause tachycardia (increased heart rate). It is often, but not always, associated with hypotension (fall in blood pressure). Other symptoms including: light headedness, fatigue or even fainting might be present.
The prognosis of postural orthostatic tachycardia syndrome is good. The symptoms tend to disappear within several years. Certain of the symptoms might appear again in patients that are recovered. The problem is actually that the exact causes of postural orthostatic tachycardia syndrome are unknown. It might be due to rapid growth in teenagers, after pregnancy in women, or post-viral infection.
Injury such as a car accident, as in your case, might cause postural orthostatic tachycardia syndrome. The treatment includes a combination of medications, physical therapy, and dietary changes.
You might want to visit a neurologist to check your current condition and see if other medications than midodrine (generic name: proamatine) is needed.
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