Prognostic value of two-dimensional echocardiography and N-terminal proatrial natriuretic peptide following an acute myocardial infarction. Assessment of baseline values (2–7 days) and changes at 3 months in patients with a preserved systolic function

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Abstract
Aims The purpose of this prospective, observational study was to evaluate the relationship of left ventricular volumes, systolic function and plasma N-terminal proatrial natriuretic peptide (Nt-proANP) to cardiac morbidity and mortality in post-myocardial infarction patients with left ventricular ejection fraction ≥40%. Methods and Results Two-dimensional echocardiographic recordings and Nt-proANP measurements were obtained in 834 patients who survived acute myocardial infarction. Patients were examined at 2–7 days and 3 months after the index infarction and followed up for 24 months. All measurements of left ventricular volumes, ejection fraction and Nt-proANP were performed in core laboratories. During follow-up 102 patients sustained one or more incidents of the combined primary end-point: cardiac death (n=11), recurrent infarction (n=55) or heart failure requiring hospitalization or treatment with an ACE inhibitor and a diuretic (n=52). Using Cox proportional hazards model, baseline Nt-proANP predicted these events (chi-square 25·3, PPConclusions In post-myocardial infarction patients with preserved left ventricular function (left ventricular ejection fraction ≥40%) baseline Nt-proANP, but not echocardiographic left ventricular volumes predicted adverse cardiac events. Early changes in left ventricular volumes and ejection fraction from baseline to 3 months had a further prognostic impact on subsequent events (3–24 months). Copyright 2002 The European Society of Cardiology. Published by Elsevier Science Ltd. All rights reserved.

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