Final answer:
The dosage of magnesium sulfate for torsades with a pulse or AMI with hypomagnesemia can vary, with Options A and B generally considered appropriate. IVP administration and Option D dosage are typically not used.
Step-by-step explanation:
When treating torsades de pointes with a pulse or acute myocardial infarction (AMI) with hypomagnesemia, the recommended dosage of magnesium sulfate varies depending on the situation. In torsades de pointes with a pulse, the recommended dosage is usually 1-2 grams administered over 5 to 20 minutes (Option A). For AMI with hypomagnesemia, the recommended dosage is usually 1-2 grams administered over 5 to 60 minutes (Option B). Intravenous push (IVP) administration is not typically recommended for magnesium sulfate in these situations (Option C). Additionally, the dosage of 0.5-1 gram per hour IV (Option D) is not usually used for these conditions.