This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Pharmacology
Treatment of torse de pointes: 
Select and explain. 
A. Propranolol, B. Calcium channel blocker, C. MgSO4, D. Lignocaine
C: MgSO4
Answer: C: MgSO4 
Explanation: Ans. C. MgSO4 Torse de pointe blocks the out potassium and inward calcium channel due to which there is prolongation of QT interval. Drug causing this are thiazides, ondansetron, sotalol. Drug of choice to terminate this magnesium sulfate.