Explore the intricacies of measuring the QT interval and delve into the causes of long QT syndrome in this comprehensive 23-minute video. Learn about the normal range of the QT interval, discuss debated questions surrounding its measurement, and understand the proper techniques for accurate assessment. Examine various etiologies of prolonged QT intervals, including congenital long QT syndrome (LOTS). Gain insights into the potentially fatal arrhythmia torsades de pointes and its relationship to QT abnormalities. Additionally, briefly touch upon short QT syndrome to round out your understanding of QT interval-related conditions.