Long QT Syndrome (LQTS) is an inherited defect in the heart rhythm that predisposes to syncope without warning (sudden fainting spells), dizziness, palpitations, seizures and sudden death. The name of the syndrome comes from the QT segment in the tracing on the electrocardiogram (EKG). This segment lasts slightly longer in the syndrome than normal. The heart takes longer to recharge itself between beats. Certain conditions can trigger an abnormal cardiac rhythm. Among the known triggers are intense physical exercise, swimming or being suddenly startled or badly frightened.
Children with long QT Syndrome should not engage in competitive sports. Noncompetitive activities are generally all right. However, they should stop whatever they are doing if they experience any possible symptoms of LQTS.
