Journal of Veterinary Clinics (한국임상수의학회지)

The Korean Society of Veterinary Clinics (한국임상수의학회)
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Comparison of Radiographic and Echocardiographic Features between Small and Large dogs with Heartworm Disease

  • Kim, So-Young (Department of Veterinary Medical Imaging, College of Veterinary Medicine, Chungnam National University) ;
  • Park, Hyun-Young (Department of Veterinary Medical Imaging, College of Veterinary Medicine, Chungnam National University) ;
  • Lee, Jung-Yang (Department of Veterinary Medical Imaging, College of Veterinary Medicine, Chungnam National University) ;
  • Lee, Young-Won (Department of Veterinary Medical Imaging, College of Veterinary Medicine, Chungnam National University) ;
  • Choi, Ho-Jung (Department of Veterinary Medical Imaging, College of Veterinary Medicine, Chungnam National University)
  • Received : 2019.06.13
  • Accepted : 2019.08.09
  • Published : 2019.08.30
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Abstract

This study was performed to compare the radiographic and echocardiographic features of cardiovascular changes between small and large dogs with heartworm diseases. Total of 49 dogs from two institutions were included in this study. The dogs were diagnosed with heartworm infestation and underwent thoracic and echocardiography. On thoracic radiographs, vertebral heart scale, reverse D shape, main pulmonary artery dilation, peripheral pulmonary artery dilation, and evidence of right heart failure were evaluated. On echocardiographs, visibility of worms, main pulmonary artery to aortic root (MPA/Ao) ratio, right to left ventricular basal diameter (RVD/LVD) ratio, and pulmonary hypertension were evaluated and analyzed between small and large dogs. The proportion of reverse D shape of the heart and accuracy for right ventricular hypertrophy in small dogs were lower than those of the large dogs. For echocardiographic parameter, the MPA/Ao and RVD/LVD ratio in the small dogs were significantly lower than those of the large dogs. As the results, thoracic radiography have a tendency to underestimate the severity of HWD in small dogs and should be used with echocardiography.

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References

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