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http://news.vanderbilt.edu/2014/03/viral-illness-may-spur-standing-up-disorder/
excerpt
excerpt
Circulating “autoantibodies” possibly triggered by a viral illness may contribute an abnormally rapid heart rate or tachycardia upon standing that affects 500,000 Americans, mostly young women, according to researchers at the University of Oklahoma and Vanderbilt University.
Their findings, published Feb. 26 by the Journal of the American Heart Association, could lead to new treatments for the condition, called postural tachycardia syndrome, or POTS.
Symptoms also include shortness of breath and weakness upon standing, and exercise “intolerance” that have lasted for at least six months.
Satish Raj, M.D., MSCI
“The cause of POTS is probably multifactorial, with different underlying causes in different patients” said co-author Satish Raj, M.D., MSCI, associate professor of Medicine and Pharmacology at Vanderbilt and consultant at the VanderbiltAutonomic Dysfunction Center. In some patients, however, symptoms occur after a “viral-type” illness, he said.