When the heart contracts, it emits an electrical signal. The Q- T interval represents the time for electrical activation and inactivation of the ventricles , the lower chambers of the heart. If it takes longer than normal, it's called a prolonged Q-T interval. People with LQTS may not have any symptoms.
Some arrhythmias are potentially fatal, causing sudden death.
In one type of inherited long Q-T syndrome, the person is also deaf. Alternatively, some healthy, young people may not have a routine EKG, and LQTS may be suspected because of their family history or because of unexplained fainting episodes. There are treatments for long Q-T syndrome, including medications such as beta blockers. Sometimes a surgical procedure is performed, and some people may benefit from an implantable defibrillator. Inc. All rights reserved.