Congenital Long QT Syndrome is a heart condition that affects the electrical system, leading to prolonged intervals between heartbeats. This can result in irregular heart rhythms, known as arrhythmias, which may cause fainting, seizures, or even sudden cardiac arrest. The condition is often inherited and can be triggered by stress, exercise, or certain medications. Diagnosis typically involves an electrocardiogram (ECG) to measure the heart's electrical activity. Treatment options may include lifestyle changes, medications, or the implantation of a cardiac defibrillator to manage the risk of dangerous arrhythmias. Early detection and management are crucial for improving outcomes.