Short QT Syndrome

Short QT syndrome causes 

Short QT syndrome is usually caused by genetic mutations affecting ion channels in the heart. This results in a shortened QT interval, leading to abnormal heart rhythms. 

SQTS is usually inherited in an autosomal dominant pattern, which means one parent with the condition can pass it on. 

Short QT syndrome risk factors 

• Family history of Short QT Syndrome or sudden cardiac arrest.
• Genetic mutations in ion channels of the heart muscle.
• A known history of arrhythmias or other heart rhythm disorders. 

Short QT syndrome symptoms 

Symptoms can include: 

• Palpitations 
• Dizziness 
• Fainting 
• Seizures due to irregular heart rhythms 

Some people may not experience symptoms until a life-threatening arrhythmia or sudden cardiac arrest occurs. 

Short QT syndrome diagnosis 

SQTS is traditionally diagnosed through an electrocardiogram (ECG) which shows a short QT interval. In some cases, genetic testing can identify mutations in ion channel genes associated with SQTS. 

Family history and other heart-related tests can help assess arrhythmia risk and overall heart health.

Short QT syndrome treatment 

After diagnosis, treatment for SQTS can include: 

• Medications like antiarrhythmic drugs, help to control abnormal heart rhythms. 
• Using an implantable cardioverter-defibrillator (ICD) may be necessary for people who are considered high-risk. This is used to prevent sudden cardiac arrest. 
• Regular monitoring and lifestyle modifications to manage heart rhythm and reduce risk. 

When to seek care 

Contact your primary care doctor or cardiologist if you start to experience: 

• Unexplained palpitations, dizziness, fainting or seizures. 
• If you have a family history of Short QT Syndrome, arrhythmias or sudden cardiac arrest. 

If you are diagnosed with Short QT Syndrome, seek regular medical follow-up to manage the condition and monitor heart health.