<prompt> QT prolongation is seen in all except :hypothermiadigitalis toxicityhypocalcemiahypercalacemia  <response>: CONGENITAL LONG QT SYNDROME Due to Genetic defects in K channels involved during repolarization. Severe form Includes: I. Jerveu Lange ,ynarome deafness, syncopal attacks , sudden death 2. Romano Ward Syndrome similar to Jervell Lange syndrome but without deafness ACQUIRED DRUGS During Sleep Hypocalcernia Acute Myocarditis Acute Mvocadial Infarction Hypotnermia HOCM Cerebral Injury Adyanced AV Blocks ref : harrisons 21st ed 