This is so common: That i despair of accurate diagnosis. Your heart and BP at 18 are controlled by the limbic system of the brain---a computer that organizes your ability to adapt to environment. Defective oxidative metabolism causes the computer to send out unnecessary signals through the sympathetic nervous system. Commonest cause is vitamin b1 and magnesium deficiency from ingestion of sugar and sweeteners.
Answered 6/10/2014
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