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Samuel J McClure a Department of
Cardiology, Western Infirmary, Glasgow G11 6NT, b Station Road Surgery, Milngavie, Glasgow
Correspondence to: Professor McMurray
j.mcmurray{at}bio.gla.ac.uk
Objectives: To determine whether blood natriuretic
peptide concentrations are helpful in identifying or excluding left ventricular systolic dysfunction in stable survivors of acute myocardial infarction.
Design: Comparison of blood natriuretic peptide
concentrations with echocardiographic assessment of left ventricular systolic function in a general practice population.
Setting: Practices in Western District of Glasgow
audit group.
Subjects: 134 long term survivors of myocardial
infarction recalled for echocardiography as part of a primary care secondary prevention audit.
Main outcome measures: Area under the receiver
operating curve for brain natriuretic peptide and
N-terminal atrial natriuretic peptide.
Results: Brain natriuretic peptide was of some
diagnostic utility in identifying the minority of subjects with severe left ventricular dysfunction (area under curve=0.73) but was unable to
discriminate between patients with moderately severe dysfunction and
those with preserved left ventricular function (area under curve for
moderate or severe dysfunction=0.54). The corresponding values for
N-terminal atrial natriuretic peptide for severe and moderate or severe dysfunction were 0.55 and 0.56 respectively.
Conclusions: Blood natriuretic peptide concentrations
are not useful in identifying important left ventricular systolic dysfunction in stable survivors of myocardial
infarction.
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