DOPPLER ECHOCARDIOGRAPHY IN THE DOG: MEASUREMENT VARIABILITY AND REPRODUCIBILITY

Authors

  • Joanna Dukes-McEwan BVMS, MVM, PhD, DVC, MRCVS,

    Corresponding author
    1. Cardiopulmonary Service, Hospital for Small Animals, Department of Veterinary Clinical Studies, Royal (Dick) School of Veterinary Studies, The University of Edinburgh, Easter Bush Veterinary Centre, Roslin, Midlothian EH25 9RG, Scotland, UK.
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  • Anne T. French MVB, DVC, MRCVS,

    1. Cardiopulmonary Service, Hospital for Small Animals, Department of Veterinary Clinical Studies, Royal (Dick) School of Veterinary Studies, The University of Edinburgh, Easter Bush Veterinary Centre, Roslin, Midlothian EH25 9RG, Scotland, UK.
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  • Brendan M. Corcoran MVB, DipPharm, PhD, MRCVS

    1. Cardiopulmonary Service, Hospital for Small Animals, Department of Veterinary Clinical Studies, Royal (Dick) School of Veterinary Studies, The University of Edinburgh, Easter Bush Veterinary Centre, Roslin, Midlothian EH25 9RG, Scotland, UK.
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  • Supported by The Kennel Club Charitable Trust, which covered the expenses of this study and funded JDMcE during 1996–1999. The British Heart Foundation currently supports JDMcE (PG/98060).

Address correspondence and reprint requests to Dukes-McEwan, BVMS. at above address.

Abstract

Serial Doppler echocardiographic examinations were carried out in random order on six boxer dogs, on 3 separate days, by two experienced Doppler echocardiographers, to assess measurement variability and reproducibility of 65 parameters. Large numbers of parameters exhibited significant differences for each of the categories of intraobserver, interobserver, interday and interoperator. The coefficients of variation for all parameters measured ranged from 5.03 to 46.43%, but most were less than 20%. In general, least variation was found for the intraobserver category, and the best reproducibility for M-mode and left ventricular volumetric data. The worst reproducibility was found for tricuspid inflow and pulmonary venous flow measurements. The results of this study suggest differences greater than 20% for serial scans must be achieved to document genuine change, although the specific data should be consulted. Furthermore, variability and reproducibility are improved if a single experienced operator/observer acquires and measures serial scans.

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