<prompt> Which of the following is not associated with prolonged QT syndrome?Romanowald syndromeJervell and Lange Neilsen syndromeEncainide therapyLidocaine therapy  <response>: Ans. is d i.e., Lidocaine therapy The Long QT syndrome refers to specific congenital or acquired abnormalities of repolarization that result in prolongation of the QT interval. The significance of the long QT syndrome is its association with the development of a specific type of ventricular tachycardia called Torsades de points or polymorphic ventricular tachycardiaQ. This arrythmia is characterized by A wide complex tachyarrythmia with QRS complexes of varying axis and morphology that appear to rotate around the iso electric baseline.Conditions associated with prolonged QT syndromeCongenital Romanowald syndrome Jervell and lange Nielse syndrome TT b Blockers--Normal hearingSensorineural hearingAcquired Antiarrythmic drugs IA IC III---Quinidine, procainamide, DisopyramideEncainide, FlecainideSotatol, Amiodarone TCAS Antibiotics macrolides, cotrimoxazole Terfenadine when combined with macrolides or antifungalMetabolic Hypokalemia Hypocalcemia HypomagnesemiaTT of acquired prolonged QT syndrome Atrial or ventricular overdrive pacing Magnesium 