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Plasma natriuretic peptides as indicators of left ventricular remodeling after myocardial infarction
Y Yoshitomi1, T Nishikimi, S Kojima
1Department of Clinical Research, Tohsei National Hospital, Shizuoka, Japan.
Insights
Natriuretic peptides, including atrial natriuretic peptide and brain natriuretic peptide, increase after myocardial infarction. Elevated levels correlate with left ventricular remodeling, suggesting their use in predicting heart failure risk.
Area of Science:
- Cardiology
- Biochemistry
Background:
- Acute myocardial infarction can lead to left ventricular remodeling.
- Natriuretic peptides are involved in cardiovascular regulation.
Purpose of the Study:
- To investigate the relationship between natriuretic peptides and left ventricular remodeling post-myocardial infarction.
- To assess the potential of natriuretic peptides as biomarkers for adverse cardiac events.
Main Methods:
- 33 patients with acute myocardial infarction underwent left ventriculography and blood sampling at admission, 1 month, and 3 months.
- Plasma concentrations of atrial natriuretic peptide and brain natriuretic peptide were measured.
- Correlations between natriuretic peptide levels and left ventricular remodeling parameters were analyzed.
Main Results:
- Plasma atrial and brain natriuretic peptide concentrations were elevated at 1 and 3 months post-myocardial infarction compared to controls.
- Brain natriuretic peptide concentrations showed significant correlation with changes in left ventricular end-diastolic volume index at 1 and 3 months.
- Atrial natriuretic peptide concentrations also correlated significantly with left ventricular end-diastolic volume index changes at both time points.
Conclusions:
- Natriuretic peptide concentrations increase in the chronic phase after acute myocardial infarction.
- These elevated natriuretic peptide levels are associated with left ventricular remodeling.
- Atrial natriuretic peptide and brain natriuretic peptide may serve as valuable biochemical markers for identifying patients at risk of heart failure or sudden death.
Abstract:
To investigate the relationship between natriuretic peptides and left ventricular remodeling after acute myocardial infarction, left ventriculography and blood sampling were performed on admission, after 1 month and after 3 months in 33 patients with acute myocardial infarction (15 anterior and 18 inferior). Plasma atrial and brain natriuretic peptide concentrations at 1 and 3 months were higher than those of controls (P<0.01). Brain natriuretic peptide concentrations correlated with changes in left ventricular end-diastolic volume index after 1 and 3 months (1 month: r=0.57, P=0.003; 3 months: r=0.47, P=0.006). Atrial natriuretic peptide concentrations also correlated with changes in left ventricular end-diastolic volume index after 1 and 3 months (1 month: r=0.40, P=0.02; 3 months: r=0.61, P<0.001). Our results indicate that natriuretic peptide concentrations increase in the chronic phase of acute myocardial infarction and may relate to left ventricular remodeling. Thus, atrial natriuretic peptide as well as brain natriuretic peptide concentrations may be useful biochemical markers in identifying asymptomatic patients at risk for heart failure or sudden death after acute myocardial infarction.