Copyright © 2001 by the European Society of Cardiology.
Microalbuminuria during acute myocardial infarction; a strong predictor for 1-year mortality
a Division of Cardiology, Conegliano General Hospital, Padua, Italy
b Division of Internal Medicine, Adria General Hospital, Padua, Italy
c Division of Cardiology, Bassano del Grappa General Hospital, Padua, Italy
d Clinica Medica 4, University of Padova, Padua, Italy
revised December 22, 2000; accepted January 2, 2001
Abstract
Aims Urinary albumin excretion increases during acute myocardial infarction but little is known on the prognostic significance and the pathophysiological mechanisms of microalbuminuria in this clinical setting. The primary aim of the study was to examine whether urinary albumin excretion has predictive power for 1-year mortality after acute myocardial infarction. A secondary objective was to gain insight into the pathophysiological mechanisms of increased urinary albumin in myocardial infarction.
Methods and Results This is a prospective cohort study conducted in three coronary care units (Northeast Italy). Four hundred and thirty-two unselected, consecutively enrolled patients with acute myocardial infarction (66·3± 12·3 years of age) were studied. The incidence of mortality was related to the baseline urinary albumin:creatinine ratio. The best cut-off for total mortality approximated to 50mg.g–1on the first day after myocardial infarction, 30mg.g–1on the third day, and to 20mg.g–1on the seventh day. At multivariable Cox analysis, the albumin:creatinine ratio was the strongest among several independent predictors of mortality (adjusted relative risks: 3·6 (95% CI, 2·1–6·2) on the first day, 4·9 (95% CI, 2·9–8·2) on the third day and 4·0 (95% CI, 2·3–6·8) on the seventh day). Independent determinants of urinary albumin were plasma aldosterone on the first day, and inflammatory markers on the third and seventh days.
Conclusion Urinary albumin assessed in the first week after acute myocardial infarction is a strong prognostic marker for 1-year mortality.
Key Words: acute myocardial infarction, microalbuminuria, albumin:creatinine ratio, aldosterone, inflammatory markers, prognosis
f1 Correspondence: Professor Paolo Palatini, Clinica Medica 4, Via Giustiniani, 2, 35128 Padova, Italy.
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