Long QT Syndrome is a heart condition that affects the electrical system, causing the heart to take longer than normal to recharge between beats. This delay can lead to irregular heart rhythms, known as arrhythmias, which may result in fainting, seizures, or even sudden cardiac arrest. The condition can be inherited or caused by certain medications and medical conditions. Diagnosis typically involves an electrocardiogram (ECG) to measure the heart's electrical activity. Treatment options may include lifestyle changes, medications, or in some cases, an implantable device to help regulate the heart's rhythm.