Long-term prognostic value of midregional pro-adrenomedullin and C-terminal pro-endothelin-1 in patients with acute myocardial infarction
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Michael Behnes
Abstract
Background: Midregional pro-adrenomedullin (MR-proADM) and endothelin-1 have been shown to predict mortality of patients with acute myocardial infarction. However, the prognostic value of both biomarkers in predicting long-term clinical events after acute myocardial infarction remains unclear.
Methods: In a prospective study, 30 patients suffering from acute ST elevation myocardial infarction or non-ST elevation myocardial infarction were enrolled. Measurements of MR-proADM and CT-pro-endothelin-1 (CT-proET-1) were performed at initial presentation, 2 or 3 days and 4 months after acute myocardial infarction. Long-term clinical events (e.g., recurrent myocardial infarction, percutaneous transluminal coronary angioplasty, aorto-coronary venous bypass or cardiogenic shock) were documented over a period from the 4th until the 10th month.
Results: Both MR-proADM and CT-proET-1 were able to differentiate patients with subsequent long-term clinical events (n=11) from those without (n=19). At the time of acute myocardial infarction, median MR-proADM level of the event group was 0.69 nmol/L as compared to 0.59 nmol/L of the no-event group (p=0.036). A difference was still observed after 3 days (event group median 0.66 nmol/L; no-event group median 0.57 nmol/L; p=0.022). Accordingly, median CT-proET-1 level was 72.9 pmol/L in the event group as compared to a median of 54.4 pmol/L in patients in the no-event group (p=0.009) 3 days after acute myocardial infarction. Within the acute phase, patients with MR-proADM levels ≥0.67 nmol/L were 3 times more likely (relative risk 2.8; 95% confidence interval 1.2–6.9; p=0.042) to suffer from a future clinical event. The area under the curve (AUC) was 0.71 (95% confidence interval 0.51–0.86; p=0.046). After 3 days, patients with CT-proET-1 levels ≥57 pmol/L were 6 times more likely (relative risk 5.9; 95% confidence interval 0.9–40.4; p=0.036) to suffer from a future clinical event. The AUC was 0.76 (95% confidence interval 0.55–0.90; p=0.015).
Conclusions: Elevated levels of MR-proADM and CT-proET-1 during the acute phase of myocardial infarction may predict an adverse long-term clinical outcome.
Clin Chem Lab Med 2008;46:204–11.
©2008 by Walter de Gruyter Berlin New York
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Artikel in diesem Heft
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- Genetics and Molecular Diagnostics
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