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Serum and red blood cell Mg levels in acute coronary events
J N Pereira1, C Rabaçal, M J Laires
1Cardiology Department, Hospital Vila Franca Xira, Lisbon, Portugal.
Insights
Serum magnesium (s-Mg) levels initially decrease in acute myocardial infarction (AMI) patients, while red blood cell magnesium (e-Mg) increases in unstable angina (UA) patients. Lower magnesium levels correlate with a poorer infarction prognosis.
Area of Science:
- Cardiology
- Clinical Biochemistry
Background:
- Magnesium is crucial for cardiovascular function.
- Alterations in magnesium levels are observed in acute coronary syndromes.
Purpose of the Study:
- To investigate serum (s-Mg) and red blood cell (e-Mg) magnesium levels in patients with acute myocardial infarction (AMI) and unstable angina (UA).
- To assess the relationship between magnesium levels and disease course, arrhythmias, and prognosis in these patients.
Main Methods:
- Prospective study involving 29 AMI and 16 UA patients.
- Serial measurements of s-Mg and e-Mg from admission to discharge.
- Statistical analysis to compare magnesium levels and correlate them with clinical outcomes.
Main Results:
- No significant difference in mean s-Mg between AMI and UA, though s-Mg tended to increase with favorable disease course.
- In AMI, s-Mg showed dynamic changes: initial decrease, increase within 24h, sharp decrease at day 4, and final increase.
- A statistically significant increase in mean e-Mg was observed during hospitalization in UA patients.
- No significant association found between magnesium levels and arrhythmias.
- A significant inverse linear correlation between magnesium levels and infarction prognosis was identified.
Conclusions:
- Magnesium levels exhibit distinct dynamic patterns in AMI and UA during hospitalization.
- Lower magnesium levels are associated with a worse prognosis in myocardial infarction.
- Further research may explore magnesium's therapeutic potential in acute coronary syndromes.
Abstract:
Serum (s-Mg) and red blood cell (e-Mg) Mg levels were assessed in 29 patients with acute myocardial infarction (AMI) and in 16 patients with unstable angina (UA), from admission until discharge. The following results were found: (1) no significant difference existed between mean s-Mg levels in AMI and UA, despite a tendency for an increase being noted with a favorable course of disease, (2) in AMI, mean s-Mg levels were initially lowered, increased within the first 24 h (p less than 0.05), decreased sharply at day 4 (p less than 0.05), and increased again until discharge (p less than 0.05). (3) in UA; the increase in mean e-Mg during hospitalization is statistically significant (p less than 0.02); (4) no significant difference was found between Mg levels and arrhythmias; and (5) a linear inverse correlation was found between Mg levels and prognosis of infarction.