Dr. Michael Ackerman, the Windland Smith Rice Cardiovascular Genomics Research Professor and Professor of Medicine, Pediatrics and Pharmacology, and Dr. Pedro Caraballo, Assistant Professor of Medicine from Mayo Clinic in Rochester, MN, assess the outcome of a study appearing in the April 2013 issue of Mayo Clinic Proceedings regarding the development of an institution wide QT alert system and the mortality rates across diverse patient populations throughout Mayo Clinic's inpatient and outpatient practice whose electrocardiogram prompted an alert because of marked QT interval prolongation.