MEDICATION-MAGNESIUM
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SUMMARY
1. Important membrane stabilizer. Hypomagnesemia causes myocardial hyper-excitability, particularly in the presence of hypokalemia.
2. Causes of hypomagnesemia: diuresis, diarrhea, alcohol-abuse.
3. Indications: Torsade's de pointes, hypomagnesemia, hypokalemia, VF or VT refractory to DC shock, cardiac arrest A/W digoxin-toxicity.
4. SE: muscle weakness, paralysis, respiratory failure.
DOSAGE
5. 5-10 mmol bolus, infusion of 20 mmol over 4 hours.
