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Plasma vasoactive peptides after acute myocardial infarction in relation to left ventricular dysfunction
P Uusimaa1, H Ruskoaho, O Vuolteenaho
1Department of Internal Medicine, University of Oulu, Finland.
International Journal of Cardiology
|June 11, 1999
Summary
B-type natriuretic peptide (BNP) is the most reliable marker for assessing left ventricular dysfunction after myocardial infarction. Its levels correlate well with ejection fraction and remain elevated post-event.
Area of Science:
- Cardiology
- Biomarkers
- Myocardial Infarction Research
Background:
- Acute myocardial infarction (AMI) can lead to left ventricular (LV) dysfunction.
- Vasoactive peptides are released during AMI and may serve as indicators of cardiac status.
Purpose of the Study:
- To evaluate plasma concentrations of vasoactive peptides as markers of LV dysfunction in AMI patients.
- To determine the reliability and correlation of these peptides with infarct size and LV function.
Main Methods:
- Serial radioimmunoassays of atrial natriuretic peptide (ANP), N-terminal proANP (NT-proANP), B-type natriuretic peptide (BNP), and endothelin-1 in 32 AMI patients.
- Estimation of infarct size via creatine kinase MB release.
- Coronary and LV cineangiography performed during hospitalization and at 6-month follow-up.
Main Results:
- Plasma levels of ANP, NT-proANP, BNP, and endothelin-1 increased post-MI, with peak levels varying by peptide.
- Natriuretic peptide levels correlated with infarct size, location, and LV dysfunction severity.
- BNP showed the strongest correlation with ejection fraction, irrespective of measurement timing.
Conclusions:
- BNP is the most effective indicator of LV dysfunction following myocardial infarction.
- The reliability of BNP as a marker is consistent throughout the hospitalization period.