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Is hypomagnesemia arrhythmogenic?

T A Millane1, D E Ward, A J Camm

  • 1Department of Cardiological Sciences, St. George's Hospital Medical School, London, England.

Clinical Cardiology
|February 1, 1992
PubMed
Summary
This summary is machine-generated.

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Isolated magnesium deficiency does not cause cardiac arrhythmias. However, low magnesium levels worsen potassium-depletion-induced arrhythmias, especially with digoxin toxicity.

Area of Science:

  • Cardiology
  • Electrophysiology
  • Medical Biochemistry

Background:

  • Magnesium's role in cardiac conduction is complex due to its numerous intracellular functions.
  • Previous reports linked magnesium deficiency to various arrhythmias, but often overlooked concurrent potassium depletion.

Purpose of the Study:

  • To evaluate the arrhythmogenic potential of isolated hypomagnesemia.
  • To clarify the interaction between magnesium and potassium levels in cardiac rhythm disturbances.

Main Methods:

  • Review and synthesis of existing basic science and clinical research data.
  • Analysis of reported cases of arrhythmia associated with hypomagnesemia.

Main Results:

  • Evidence refutes the claim that isolated hypomagnesemia causes arrhythmias.

Related Experiment Videos

  • Hypomagnesemia significantly exacerbates arrhythmias caused by hypokalemia, particularly with digoxin toxicity.

    • Conclusions:

    • Simultaneous repletion of potassium and magnesium is logical and effective for hypokalemia-induced arrhythmias.
    • Intravenous magnesium's antiarrhythmic effects in ventricular tachyarrhythmia are independent of magnesium balance.