BMJ 1998;317:516-519 ( 22 August )

General Practice

Cohort study of plasma natriuretic peptides for identifying left ventricular systolic dysfunction in primary care

Samuel J McClure, clinical research fellowa Lynn Caruana, cardiac techniciana Andrew P Davie, lecturer in cardiologya Steven Goldthorp, general practitionerb John J V McMurray, consultant cardiologista

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.

Key messages

  • Plasma concentrations of brain and N-terminal atrial natriuretic peptide increase in patients with left ventricular systolic dysfunction

  • Both peptides are stable in blood and can be measured relatively quickly and inexpensively.

  • In this general practice cohort of survivors of myocardial infarction brain natriuretic peptide had some value in identifying patients with severe left ventricular systolic dysfunction as determined by echocardiography

  • Measurement of either peptide concentration was unable to discriminate between patients with moderate left ventricular dysfunction and normal function

  • Brain and N-terminal atrial natriuretic peptide are not useful for detecting left ventricular systolic dysfunction in ordinary clinical practice




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Natriuretic peptides poorly predict left ventricular function in general practice
BMJ 1998 317: 0. [Full Text]

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Rapid Responses:

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Renal impairment must be taken into account
Suneel Talwar
bmj.com, 7 Sep 1998 [Full text]



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