title: Low serum magnesium concentrations predict cardiovascular and all-cause mortality.
abstract: BACKGROUND
  Low serum magnesium (Mg(++)) levels are associated with future development of left ventricular hypertrophy independently of common cardiovascular risk factors, as recently demonstrated in the five-year follow-up of the population-based Study of Health in Pomerania (SHIP). As left ventricular hypertrophy has significant prognostic implications, we hypothesized that serum Mg(++) levels are associated with cardiovascular mortality.
  
  
  RESULTS
  All-cause mortality and cardiovascular mortality were analyzed in relationship to serum Mg(++) concentrations at baseline by Cox proportional hazard model in SHIP (n=4203, exclusion of subjects with Mg(++) supplementation). The median duration of mortality follow-up was 10.1 years (25th percentile: 9.4 years, 75th percentile: 10.8 years; 38,075 person-years). During the follow-up, 417 deaths occurred. Mortality in subjects with Mg(++)≤0.73 mmol/l was significantly higher for all-cause deaths (10.95 death per 1000 person years), and cardiovascular deaths (3.44 deaths per 1000 person years) in comparison to higher Mg(++) concentrations (1.45 deaths from all-cause per 1000 person years, 1.53 deaths from cardiovascular cause per 1000 person years). This association remained statistically significant after adjustment for multiple cardiovascular risk factors, including arterial hypertension, and antihypertensive therapy including diuretics (log-rank-test p=0.0001 for all-cause mortality, and p=0.0174 for cardiovascular mortality).
  
  
  CONCLUSIONS
  Low serum Mg(++) levels are associated with higher all-cause mortality and cardiovascular mortality. This corresponds well with recent findings that hypomagnesemia is associated with the increase of left ventricular mass over the following years.
authors.affiliation: Klinik und Poliklinik für Innere Medizin B, Universitätsklinikum der Ernst-Moritz-Arndt-Universität Greifswald, Friedrich-Löffler Str. 23 a, 17487 Greifswald, Germany. ThorstenReffelmann@web.de
authors.forename: Thorsten
authors.initials: T
authors.lastname: Reffelmann
authors.forename: Till
authors.initials: T
authors.lastname: Ittermann
authors.forename: Marcus
authors.initials: M
authors.lastname: Dörr
authors.forename: Henry
authors.initials: H
authors.lastname: Völzke
authors.forename: Markus
authors.initials: M
authors.lastname: Reinthaler
authors.forename: Astrid
authors.initials: A
authors.lastname: Petersmann
authors.forename: Stephan B
authors.initials: SB
authors.lastname: Felix
mesh_terms: D000328:Adult; D002318:Cardiovascular Diseases / Q000401:mortality*; D002423:Cause of Death; D005260:Female; D005858:Germany / Q000453:epidemiology; D006801:Humans; D006973:Hypertension / Q000401:mortality; D017379:Hypertrophy, Left Ventricular / Q000209:etiology / Q000401:mortality; D008274:Magnesium / Q000097:blood*; D008297:Male; D008875:Middle Aged; D016016:Proportional Hazards Models
chemical_list: D008274:Magnesium