Drs. Malik and Batchvarov have spent several years investigating ways to measure and understand QT dispersion. In this 12th volume of the Clinical Approaches to Tachyarrhythmias series, they present their perspective of the value and clinical relevance of this deceptively simple electrocardiographic parameter. The book examines the background and principles of QT dispersion and of the technology used to measure it; discusses the physiological characteristics...