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Magnesium deficiency: pathogenesis, prevalence, and clinical implications.

R Whang

    The American Journal of Medicine
    |March 20, 1987
    PubMed
    Summary

    Magnesium deficiency is underdiagnosed, especially in cardiovascular patients on diuretics or digitalis. Supplementation can correct refractory potassium depletion and prevent sudden death risk.

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    Area of Science:

    • Cardiology
    • Electrolyte Balance
    • Clinical Medicine

    Background:

    • Hypomagnesemia is a frequently underdiagnosed electrolyte imbalance.
    • Patients with cardiovascular disease (CVD) treated with diuretics or digitalis are at high risk for magnesium deficiency.
    • Both potassium and magnesium deficiencies are linked to ventricular ectopy and sudden cardiac death.

    Purpose of the Study:

    • To highlight the underdiagnosis of hypomagnesemia.
    • To emphasize the link between magnesium deficiency and cardiovascular health.
    • To recommend routine magnesium testing and supplementation.

    Main Methods:

    • Review of current medical practice regarding electrolyte deficiencies.
    • Analysis of patient populations at risk for magnesium depletion (e.g., those on diuretics/digitalis).
    • Correlation of electrolyte levels with cardiac events and treatment outcomes.

    Main Results:

    • Magnesium deficiency is common and often overlooked, particularly in CVD patients.
    • Concomitant magnesium depletion can cause refractory potassium repletion.
    • Magnesium supplementation can correct refractory hypokalemia.

    Conclusions:

    • Routine serum magnesium testing is recommended for patients requiring electrolyte level checks, especially those on diuretics or digitalis.
    • Both potassium and magnesium should be repleted in hypokalemic patients, as hypomagnesemia may not be evident.
    • Potassium-/magnesium-sparing diuretics may aid in preventing these deficiencies.

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