Yes.: It is called "heart rate variability" and is an indicator of vagal nerve tone and vagal nerve health. It can also be a predictor of future cardiovascular events. Please see my previous response to you in regards to p.O.T.S. And Insulin resistance. Have your dr. Check you for the Insulin resistance syndrome, glucose tolerance test with Insulin levels checked every 30 minutes for 2 hours.
Answered 6/25/2014
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