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Serum magnesium and risk of sudden cardiac death in the Atherosclerosis Risk in Communities (ARIC) Study.

TitleSerum magnesium and risk of sudden cardiac death in the Atherosclerosis Risk in Communities (ARIC) Study.
Publication TypeJournal Article
Year of Publication2010
AuthorsPeacock JM, Ohira T, Post W, Sotoodehnia N, Rosamond W, Folsom AR
JournalAm Heart J
Volume160
Issue3
Pagination464-70
Date Published2010 Sep
ISSN1097-6744
KeywordsAtherosclerosis, Death, Sudden, Cardiac, Effect Modifier, Epidemiologic, Female, Humans, Magnesium, Male, Middle Aged, Proportional Hazards Models, Risk Factors
Abstract

BACKGROUND: We hypothesized that serum magnesium (Mg) is associated with increased risk of sudden cardiac death (SCD).

METHODS: The Atherosclerosis Risk in Communities Study assessed risk factors and levels of serum Mg in a cohort of 45- to 64-year-old subjects in 1987-1989 (n = 14,232). After an average of 12 years of follow-up, we observed 264 cases of SCD, as determined by physician review of all suspected cases. We used proportional hazards regression to evaluate the association of serum Mg with risk of SCD.

RESULTS: Individuals in the highest quartile of serum Mg were at significantly lower risk of SCD in all models. This association persisted after adjustment for potential confounding variables, with an almost 40% reduced risk of SCD (hazard ratio 0.62, 95% CI 0.42-0.93) in quartile 4 versus 1 of serum Mg observed in the fully adjusted model.

CONCLUSIONS: This study suggests that low levels of serum Mg may be an important predictor of SCD. Further research into the effectiveness of Mg supplementation for those considered to be at high risk for SCD is warranted.

DOI10.1016/j.ahj.2010.06.012
Alternate JournalAm Heart J
PubMed ID20826254
PubMed Central IDPMC2939007
Grant ListN01 HC055019 / HC / NHLBI NIH HHS / United States