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Endothelin-1 in patients with complicated and uncomplicated myocardial infarction
P Lechleitner1, N Genser, J Mair
1Universitätsklinik für Innere Medizin, Universität Innsbruck.
Insights
Elevated endothelin-1 levels in acute myocardial infarction patients indicate complications. Higher concentrations correlate with reduced cardiac function and increased ischemia risk, suggesting endothelin-1 as a potential biomarker.
Area of Science:
- Cardiology
- Biochemistry
Background:
- Endothelin-1 is a potent vasoconstrictor peptide implicated in cardiovascular diseases.
- Its role in acute myocardial infarction (AMI) and association with complications requires further elucidation.
Purpose of the Study:
- To investigate plasma endothelin-1 concentrations in patients with AMI.
- To determine the correlation between endothelin-1 levels and clinical outcomes, cardiac function, and myocardial damage markers.
Main Methods:
- Peripheral venous blood samples were collected from 42 AMI patients.
- Endothelin-1 concentrations were measured on admission and up to day 6.
- Correlations with creatine kinase, creatine kinase isoenzyme MB mass, and left ventricular ejection fraction were analyzed.
Main Results:
- Patients with ischemic or hemodynamic complications (n=11) exhibited significantly higher endothelin-1 levels on admission and until day 6 compared to uncomplicated cases (n=31).
- No significant correlation was found between peak endothelin-1 and creatine kinase or its isoenzyme MB mass.
- A significant inverse correlation was observed between left ventricular ejection fraction and peak endothelin-1 concentrations in complicated patients (r=-0.71; P=0.03).
Conclusions:
- Plasma endothelin-1 levels may serve as a biomarker for depressed cardiac performance and recurrent ischemia in AMI patients.
- Elevated endothelin-1 is associated with complications following acute myocardial infarction.
Abstract:
Endothelin-1 concentrations were measured in peripheral venous blood samples from 42 patients with acute myocardial infarction. In patients with ischemic or hemodynamic complications (n = 11), endothelin-1 concentrations were significantly higher already on admission (P = 0.008) and remained significantly higher until day 6 after admission compared to patients with uncomplicated infarctions (n = 31; P = 0.035). There were no close correlations between peak concentrations of endothelin-1 and creatine kinase or creatine kinase isoenzyme MB mass in either group. Only in complicated patients did left ventricular ejection fraction correlate closely and inversely with peak endothelin-1 concentrations (r = -0.71; P = 0.03). Therefore, plasma endothelin-1 concentrations in patients with acute myocardial infarction patients may reflect states of markedly depressed cardiac performance and recurrent myocardial ischemia.