Short QT Syndrome is a rare heart condition characterized by a shortened QT interval on an electrocardiogram (ECG). The QT interval represents the time it takes for the heart's electrical system to reset after each heartbeat. In individuals with this syndrome, the QT interval is less than 350 milliseconds, which can lead to abnormal heart rhythms, or arrhythmias. This condition can increase the risk of fainting, seizures, or even sudden cardiac arrest. It is often inherited and can be associated with mutations in specific genes. Diagnosis typically involves an ECG and a thorough family history to assess potential genetic links.