![]() It can also help identify other family members who may have inherited the faulty gene and need clinical assessment. Genetic testing may be needed to identify the faulty gene causing long QT syndrome. Sometimes an exercise ECG will be needed to confirm the diagnosis. If you have long QT syndrome, the trace of the QT section (showing part of the heartbeat) will be longer than normal. you have a family history of unexpected and unexplained sudden deathĪn ECG records your heart's rhythm and electrical activity. ![]() Diagnosing long QT syndromeĪ GP may recommend you have an ECG and refer you to a heart specialist (cardiologist) if: The abnormal gene affects the heart's electrical activity.Ĭertain medicines can also trigger long QT syndrome, including some types of:īut drug-induced long QT syndrome tends to only affect people who already have a tendency to develop the condition.įor more information, see Cardiac Risk in the Young: medicines people with long QT syndrome should avoid. Long QT syndrome is usually caused by a faulty gene inherited from a parent. It can also be an underlying cause of sudden infant death syndrome (SIDS). Long QT syndrome is a leading cause of sudden cardiac death in young, otherwise healthy, people. If you're able to, perform cardiopulmonary resuscitation (CPR) until medical help arrives. This is called cardiac arrest, and the heart rarely returns to normal if it is not electrically corrected with shock.Ĭall 999 for an ambulance if someone with long QT syndrome suddenly collapses and does not regain consciousness. The heart usually returns to its normal rhythm after it's been beating abnormally.īut if it continues to beat abnormally and is not treated in time with a defibrillator, the heart will stop pumping and the person will die.
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