Prognostic Value of Mid-Regional Pro-Adrenomedullin Levels Taken on Admission and Discharge in Non–ST-Elevation Myocardial Infarction: The LAMP (Leicester Acute Myocardial Infarction Peptide) II Study

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• 作者：Onkar S. Dhillon ; Sohail Q. Khan ; Hafid K. Narayan ; Kelvin H. Ng ; Joachim Struck ; Paulene A. Quinn ; Nils G. Morgenthaler ; Iain B. Squire ; Joan E. Davies ; Andreas Bergmann ; Leong L. Ng
• 关键词：adrenomedullin ; Global Registry of Acute Coronary Events score ; myocardial infarction ; N-terminal pro– ; B-type natriuretic peptide ; prognosis
• 刊名：Journal of the American College of Cardiology
• 出版年：2010
• 出版时间：6 July 2010
• 年：2010
• 卷：56
• 期：2
• 页码：125-133
• 全文大小：646 K

文摘

Objectives

The purpose of this study was to assess the prognostic value of admission and discharge mid-regional pro-adrenomedullin (sAM) levels in non–ST-elevation myocardial infarction (MI) and identify values to aid clinical decision making. N-terminal pro–B-type natriuretic peptide and GRACE (Global Registry of Acute Coronary Events) score were used as comparators.

Background

sAM is a stable precursor of adrenomedullin.

Methods

We measured plasma sAM on admission and discharge in 745 non–ST-elevation MI patients (514 men, median age 70.0 ± 12.7 years). The primary end point was a composite of death, heart failure, hospitalization, and recurrent acute MI over mean follow-up of 760 days (range 150 to 2,837 days), with each event assessed individually as secondary end points.

Results

During follow-up, 120 (16.1 % ) patients died, and there were 65 (8.7 % ) hospitalizations for heart failure and 77 (10.3 % ) recurrent acute MIs. Both admission and discharge levels were increased (median 0.81 nmol/l [range 0.06 to 5.75 nmol/l] and 0.76 nmol/l [range 0.25 to 6.95 nmol/l], respectively) compared with established normal ranges. Multivariate adjusted Cox regression models revealed that both were associated with the primary end point (hazard ratio: 9.75 on admission and 7.54 on discharge; both p < 0.001). Admission sAM was particularly associated with early (<30 days) mortality (c-statistic = 0.90, p < 0.001), and when compared with N-terminal pro–B-type natriuretic peptide and GRACE score, it was the only independent predictor of this end point. Admission sAM >1.11 nmol/l identified those at highest risk of death (p < 0.001). Patients with above-median admission sAM may benefit from revascularization.

Conclusions

sAM level is prognostic for death or heart failure. Admission levels are a strong predictor of early mortality and, when >1.11 nmol/l, complements the GRACE score to improve risk stratification.