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European Journal of Echocardiography 2004 5(1):12-17; doi:10.1016/S1525-2167(03)00042-8
© 2004 by European Society of Cardiology
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Copyright © 2003, The European Society of Cardiology

Improved interpretation of dobutamine stress echocardiography following 4 months of systematic training in patients following acute myocardial infarction

D.V Anand, I.D Theodosiadis and R Senior*

Northwick Park Hospital, Watford Road, Harrow HA1 3UJ, UK

* Corresponding author. Department of Cardiovascular Medicine, Northwick Park Hospital, Watford Road, Harrow HA1 3UJ, UK. Tel.: +44-208-869-2547/8; fax: +44-208-864-0075. roxy.senior{at}virgin.net


  Abstract

Objectives: Interpretation of stress echocardiography is subjective, and highly dependent on the experience of the interpreter. We sought to evaluate whether a cardiologist without any previous experience in stress echocardiography could adequately learn the skills of interpreting dobutamine stress echocardiograms (DSE) in post-infarct patients, after a period of systematic training.

Methods: A trainee in cardiology blindly reported 51 consecutive DSEs from a database of post-infarction studies, after 2 and 4 months of systematic training. We compared his interpretation with that of an expert.

Results: Agreement between the trainee and the expert improved significantly from 2 to 4 months of training in the left anterior descending artery territory for the overall scan interpretation (from {kappa} = 0.58 to {kappa} = 0.73; p = 0.03), wall thickening assessment in individual segments (from {kappa} = 0.40 to {kappa} = 0.55; p<0.01) and the diagnosis of viable myocardium (from {kappa} = 0.11 to {kappa} = 0.43; p = 0.01). Similar improvement was observed in left circumflex, but not in the right coronary artery territory. Agreement in identifying inducible ischaemia also remained poor.

Conclusion: This study suggests that systematic training can significantly reduce interobserver variability in a short time frame (4 months) and may improve the interpretation of DSE by a trainee. But improvements in image quality and use of predefined reading criteria are necessary to improve interobserver agreement further in myocardial regions where conformity in dobutamine stress echocardiographic interpretation is low.

Keywords: training; dobutamine stress echocardiography; acute myocardial infarction; interpretation


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