Abstract
Cardiac arrhythmias and neurological irritability frequentlycomplicatethe recoveryof children after cardiac operations. Hypomagnesaemia has been documented in up to 65010 of critically ill hospital inpatients, and has been reported to complicate the administration of loop diuretics and intravenous catecholamtnes.? Hypomagnesaemia has also been shown to be associated with an increased incidence of serious arrhythmias after myocardial infarction in adults and of fits in neonates.t However, the incidence of hypomagnesaemia and its relationship to cardiac arrhythmias and neurological symptoms in children recovering from cardiac operations has not been previously described. We studied prospectively a group of infants recovering on the intensive care unit (ICU) after closed heart operations to answer these questions.
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