Long QT interval resembling long QT syndrome in a newborn with electrolyte dysbalance.

The Q-T interval by electrocardiogram may be prolonged as a congenital or acquired condition. The congenital form, long QT syndrome (LQTS) is an electrical disorder associated with a high mortality rate. However, in newborns, electrolyte abnormalities are one of the most common causes of a long Q-T interval. We describe a newborn with a prolonged Q-T interval (0.55 secs) and abnormal T waves resembling LQTS. In this case, the patient had an electrolyte disturbance which was effectively treated. This case emphasizes the importance of investigating and distinguishing between the congenital and acquired forms of prolonged Q-T intervals.