The second group was dominated by men, including football players, and they reported experiencing symptoms of dysautonomia — the bouncing heart rate that is the main characteristic of POTS — after a concussion.
Their findings, published in the journal
the Physician and Sportsmedicine, are consistent with the first documented cases of POTS. During the Civil War, POTS was among a number of distinct syndromes once known collectively as soldier’s heart because so many members of the military exhibited symptoms. Medical historians speculate that head injuries during combat triggered some cases.