Key result
Magnesium supplementation shortened the hemodialysis-associated prolonged QTc interval from 505 ms to 483 ms in a 19-year-old female with end-stage kidney disease.
Why the study?
Hemodialysis lengthens the QT interval, a surrogate for lethal ventricular arrhythmias, but management strategies remain needed.
Does magnesium supplementation reduce hemodialysis-associated prolonged QT in an adolescent with end-stage kidney disease?
Case Report (n=1)
Does magnesium supplementation reduce hemodialysis-associated prolonged QT in an adolescent with end-stage kidney disease?
Magnesium supplementation may serve as a cardioprotective agent to reduce hemodialysis-associated QT prolongation and the risk of ventricular arrhythmias.
Answers are grounded in this paper and cite their sources.
Post-dialysis QT prolongation inversely associated with magnesium in adolescent ESRD; hypothesis-generating case report requiring prospective validation before any practice change.
Hemodialysis affects myocardial depolarization and repolarization notably lengthening the QT interval. Prolonged QT, in turn, has been a reliable surrogate for higher risk of potentially lethal ventricular arrhythmias. We present an adolescent girl with end-stage kidney disease who consistently developed prolonged QT following hemodialysis sessions. Interestingly, her QT intervals were inversely correlated with her serum magnesium levels. Magnesium supplementation appeared to help reduce the QT prolongation after hemodialysis. Our case shows the potential utility of magnesium as a cardioprotective agent in hemodialysis patients. We recommend that patients undergoing hemodialysis receive frequent electrocardiograms and electrolytes monitoring for tailored electrolytes management to reduce the risk of developing potentially lethal cardiac arrhythmias.
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Umapathi et al. (2020) conducted a case report in End-stage kidney disease on hemodialysis with prolonged QT (n=1). Magnesium supplementation vs. Pre-supplementation (hypomagnesemia state) was evaluated on QTc interval. Magnesium supplementation shortened the hemodialysis-associated prolonged QTc interval from 505 ms to 483 ms in a 19-year-old female with end-stage kidney disease.
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