Final answer:
Routine administration of magnesium sulfate in cardiac arrest is recommended.
Step-by-step explanation:
False. Routine administration of magnesium sulfate in cardiac arrest is actually recommended, regardless of whether Torsades de Pointes (TdP) is present or not. Magnesium sulfate is used in cardiac arrest as an adjunctive treatment to improve survival outcomes. It is especially useful in cases of cardiac arrest due to hypomagnesemia or TdP, but it can have beneficial effects even in the absence of TdP.