In Adult Cardiac Arrest Torsades de Pointes, what is the magnesium sulfate dose?

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Multiple Choice

In Adult Cardiac Arrest Torsades de Pointes, what is the magnesium sulfate dose?

Explanation:
Magnesium sulfate is used in adult cardiac arrest when torsades de pointes is present because it stabilizes cardiac membranes and suppresses the ectopic activity that drives this rhythm. The recommended initial dose is 2 grams given IV or IO as a bolus over about 1–2 minutes. This rapid delivery helps quickly raise magnesium levels at the heart, which can terminate torsades or prevent its progression. If the rhythm recurs, the dose can be repeated. Smaller dosing (1 gram) is not considered sufficient for this emergency, while a higher dose (4 grams) raises risk without additional proven benefit in this setting, and a slower infusion over 10 minutes delays the needed rapid effect.

Magnesium sulfate is used in adult cardiac arrest when torsades de pointes is present because it stabilizes cardiac membranes and suppresses the ectopic activity that drives this rhythm. The recommended initial dose is 2 grams given IV or IO as a bolus over about 1–2 minutes. This rapid delivery helps quickly raise magnesium levels at the heart, which can terminate torsades or prevent its progression. If the rhythm recurs, the dose can be repeated.

Smaller dosing (1 gram) is not considered sufficient for this emergency, while a higher dose (4 grams) raises risk without additional proven benefit in this setting, and a slower infusion over 10 minutes delays the needed rapid effect.

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