1.   Long QT interval syndrome can be either idiopathic or acquired.

2.   A symptom-free person with long QT syndrome is no less susceptible to sudden death.

3.   But diagnosing long QT syndrome can be tricky.

4.   For families with a history of long QT syndrome, these discoveries will provide accurate tests for the presence of the disorder, Keating said.

5.   However, Vincent said, any patient who experiences symptoms of long QT syndrome and is not receiving treatment should avoid all physical activities and even strong emotions.

6.   Long QT syndrome is believed to be a common cause of unexplained sudden deaths among school athletes, as well as the probable cause of many unexplained drownings.

7.   Long QT syndrome can be treated with beta blocker drugs.

8.   Mrs. Levy said Billy was an adopted child and the pediatric medical examiner who performed the autopsy suspected long QT syndrome had caused his death.

9.   The disorder, known as long QT syndrome, can cause seizures or rapid loss of consciousness.

10.   The problem is RFA works only for narrowly localized spots, making it useful in some young people but not for cardiomyopathy or long QT syndrome.