Long QT syndrome is a rare, inherited heart condition that affects the heart's electrical activity, leading to a prolonged QT interval on an electrocardiogram (ECG). This delay in repolarization can cause dangerous heart rhythms, such as torsades de pointes, which can lead to fainting, seizures, or sudden cardiac arrest. Individuals with long QT syndrome are at an increased risk of potentially life-threatening arrhythmias, particularly during physical activity or emotional stress. Treatment options for long QT syndrome may include medications, lifestyle modifications, and in some cases, implantation of a pacemaker or implantable cardioverter-defibrillator. Research in long QT syndrome focuses on understanding the genetic causes of the condition, identifying individuals at risk, developing more effective treatment strategies, and improving outcomes for those affected by the condition. Additionally, researchers are investigating the underlying mechanisms of arrhythmias in long QT syndrome to inform new therapeutic approaches.