Mayo researchers discover overdiagnosis of long QT heart syndrome

'Sudden death' disorder a challenge to diagnosis, but improper diagnosis has serious implications
ROCHESTER, Minn. -- Congenital long QT syndrome (LQTS) can be lethal if not diagnosed -- yet recent increased awareness of the disorder may lead to diagnosing patients when they don’t have the syndrome and then prescribing treatments that restrict patients’ lifestyles, a new Mayo Clinic study shows.