This represents the period from the onset of ventricular depolarization to completion of repolarization of the ventricular myocardium, or ventricular systole. QT interval: the interval from the beginning of the QRS complex to the end of the T wave on the surface electrocardiogram (ECG).Any new medicine, whether prescription or over the counter, will need to be carefully checked to see if it's suitable for you.įor more information you can get a booklet about life with inherited abnormal heart rhythms from the British Heart Foundation. Good sources of potassium include:Īlways tell medical staff that you have long QT syndrome. Your doctor may prescribe potassium supplements or suggest increasing the amount of potassium-rich foods in your diet. Rehydrating properly after a tummy upset is also essential, usually with supplements containing salt and sugar. Avoiding stressful situations may also be recommended. However, you may need to make some lifestyle adjustments to reduce your risk of having blackouts.įor example, you may not be able to exercise strenuously or play competitive sports, and may need to try to avoid startling noises, such as alarm clocks. With the right treatment, it's possible to avoid long QT syndrome having a major impact on your day-to-day life. If medicines are causing long QT syndrome, your medicines will be reviewed and an alternative may be prescribed. In some cases of long QT syndrome, surgery may be needed to control the flow of chemicals into the heart. If your symptoms are frequent or severe, and you have a high risk of having a life-threatening arrhythmia, you may need to have a pacemaker or implantable cardioverter defibrillator (ICD) fitted. Beta blockers, such as propranolol or nadolol, may be prescribed to help control irregular heartbeats and slow down your heart rate. Most people with inherited long QT syndrome will need treatment with medicines. 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.
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