Radiographic assessment of the cardiac silhouette in clinically normal large- and small-breed dogs

Ayman A. Mostafa Department of Small Animal Surgery, Faculty of Veterinary Medicine, Cairo University, Giza 12211, Egypt.

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 BVSc, PhD
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Clifford R. Berry Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL 32610.

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Abstract

OBJECTIVE To determine manubrium heart scores (MHSs) from measurements of cardiac short-axis length (cSAL) and long-axis length (cLAL) relative to the corresponding manubrium length (ML) on thoracic radiographic views of dogs and assess correlation of MHSs with vertebral heart scores (VHSs).

ANIMALS 120 clinically normal large-breed dogs (LBDs) and small-breed dogs (SBDs).

PROCEDURES On right lateral views (RLVs) and ventrodorsal views (VDVs) for each dog, cSAL and cLAL were measured and expressed as a ratio; the cSAL:ML ratio (short-MHS), cLAL:ML ratio (long-MHS), and cSAL-and-cLAL:ML ratio (overall-MHS) were also calculated. The VHS was determined from the RLV. Correlation of VHS with MHS was assessed.

RESULTS On RLVs and VDVs, mean cSAL:cLAL ratios were 0.77 (SD, 0.05) and 0.72 (SD, 0.05), respectively, in 60 LBDs and 0.81 (SD, 0.06) and 0.78 (SD, 0.06), respectively, in 60 SBDs. In LBDs, mean short-MHS, long-MHS, and overall-MHS were 2.1 (SD, 0.22), 2.7 (SD, 0.24), and 4.8 (SD, 0.5), respectively, on RLVs and 2.3 (SD, 0.26), 3.2 (SD, 0.34), and 5.4 (SD, 0.6), respectively, on VDVs. In SBDs, mean short-MHS, long-MHS, and overall-MHS were 2.4 (SD, 0.39), 2.9 (SD, 0.50), and 5.3 (SD, 0.83), respectively, on RLVs and 2.5 (SD, 0.44), 3.2 (SD, 0.51), and 5.8 (SD, 0.92), respectively, on VDVs. Mean VHSs were 10.73 (SD, 0.52) and 10.27 (SD, 0.81) in LBDs and SBDs, respectively. A significant correlation was identified between VHS and each MHS in LBDs.

CONCLUSIONS AND CLINICAL RELEVANCE In the dogs evaluated, radiographic cardiac dimensions and MHSs were correlated. Validity of the MHS for cardiac dimension assessment in other healthy dogs and dogs with cardiac disease warrants investigation.

Abstract

OBJECTIVE To determine manubrium heart scores (MHSs) from measurements of cardiac short-axis length (cSAL) and long-axis length (cLAL) relative to the corresponding manubrium length (ML) on thoracic radiographic views of dogs and assess correlation of MHSs with vertebral heart scores (VHSs).

ANIMALS 120 clinically normal large-breed dogs (LBDs) and small-breed dogs (SBDs).

PROCEDURES On right lateral views (RLVs) and ventrodorsal views (VDVs) for each dog, cSAL and cLAL were measured and expressed as a ratio; the cSAL:ML ratio (short-MHS), cLAL:ML ratio (long-MHS), and cSAL-and-cLAL:ML ratio (overall-MHS) were also calculated. The VHS was determined from the RLV. Correlation of VHS with MHS was assessed.

RESULTS On RLVs and VDVs, mean cSAL:cLAL ratios were 0.77 (SD, 0.05) and 0.72 (SD, 0.05), respectively, in 60 LBDs and 0.81 (SD, 0.06) and 0.78 (SD, 0.06), respectively, in 60 SBDs. In LBDs, mean short-MHS, long-MHS, and overall-MHS were 2.1 (SD, 0.22), 2.7 (SD, 0.24), and 4.8 (SD, 0.5), respectively, on RLVs and 2.3 (SD, 0.26), 3.2 (SD, 0.34), and 5.4 (SD, 0.6), respectively, on VDVs. In SBDs, mean short-MHS, long-MHS, and overall-MHS were 2.4 (SD, 0.39), 2.9 (SD, 0.50), and 5.3 (SD, 0.83), respectively, on RLVs and 2.5 (SD, 0.44), 3.2 (SD, 0.51), and 5.8 (SD, 0.92), respectively, on VDVs. Mean VHSs were 10.73 (SD, 0.52) and 10.27 (SD, 0.81) in LBDs and SBDs, respectively. A significant correlation was identified between VHS and each MHS in LBDs.

CONCLUSIONS AND CLINICAL RELEVANCE In the dogs evaluated, radiographic cardiac dimensions and MHSs were correlated. Validity of the MHS for cardiac dimension assessment in other healthy dogs and dogs with cardiac disease warrants investigation.

Contributor Notes

Address correspondence Dr. Berry (berryk@ufl.edu).
  • 1. Buchanan JW, Bücheler J. Vertebral scale system to measure canine heart size in radiographs. J Am Vet Med Assoc 1995; 206: 194199.

  • 2. Root CR, Bahr RJ. The heart and great vessels. In: Thrall DE, ed. Textbook of diagnostic veterinary radiology. 4th ed. Philadelphia: WB Saunders Co, 2002;402419.

    • Search Google Scholar
    • Export Citation
  • 3. Lamb CR, Boswood A. Role of survey radiography in diagnosing canine cardiac disease. Compend Contin Educ Pract Vet 2002; 24: 316326.

    • Search Google Scholar
    • Export Citation
  • 4. Litster AL, Buchanan JW. Vertebral scale system to measure heart size in radiographs of cats. J Am Vet Med Assoc 2000; 216: 210214.

  • 5. Hansson K, Haggstrom J, Kvart C, et al. Interobserver variability of vertebral heart size measurements in dogs with normal and enlarged hearts. Vet Radiol Ultrasound 2005; 46: 122130.

    • Crossref
    • PubMed
    • Search Google Scholar
    • Export Citation
  • 6. Jepsen-Grant K, Pollard RE, Johnson LR. Vertebral heart scores in eight dog breeds. Vet Radiol Ultrasound 2013; 54: 38.

  • 7. Lamb CR, Wikeley H, Boswood A, et al. Use of breed-specific ranges for vertebral heart scale in the radiographic diagnosis of cardiac disease in dogs. Vet Rec 2001; 148: 707711.

    • Crossref
    • PubMed
    • Search Google Scholar
    • Export Citation
  • 8. Gugjoo MB, Hoque M, Saxena AC, et al. Vertebral scale system to measure heart size in dogs in thoracic radiographs. Adv Anim Vet Sci 2013; 1: 14.

    • Search Google Scholar
    • Export Citation
  • 9. Empel W. Beurteilung der Grosse und Gestalt des Herzschattens des Deutschen Schaferhundes. Kleintierpraxis 1974; 19: 713.

  • 10. Castro MG, Tôrres RCS, Araújo RB, et al. Radiographic evaluation of the cardiac silhouette in clinically normal Yorkshire Terrier dogs through the vertebral heart size method. Arq Bras Med Vet Zootec 2011; 63: 850857.

    • Search Google Scholar
    • Export Citation
  • 11. Torad FA, Hassan EA. Two-dimensional cardiothoracic ratio for evaluation of cardiac size in German Shepherd Dogs. J Vet Cardiol 2014; 16: 237244.

  • 12. Spasojevic-Kosic L, Krstic N, Trailovic RD. Comparison of three methods of measuring vertebral heart size in German Shepherd Dogs. Acta Vet (Beogr) 2007; 57: 133141.

    • Crossref
    • Search Google Scholar
    • Export Citation
  • 13. Gulanber EG, Gonenci R, Kaya U, et al. Vertebral scale system to measure heart size in thoracic radiographs of Turkish Shepherd (Kangal) dogs. Turk J Vet Anim Sci 2005; 29: 723726.

    • Search Google Scholar
    • Export Citation
  • 14. Srivastava M, Pandey RP, Srivastava A, et al. Vertebral heart scale score of mongrel dogs. Indian J Canine Pract 2014; 6: 58.

  • 15. Saida Y, Tanaka R, Yamane Y, et al. Relationships between vertebral heart size (VHS) and echocardiographic parameters in dogs with mitral regurgitation. Adv Anim Cardiol 2006; 39: 5563.

    • Search Google Scholar
    • Export Citation
  • 16. Olive J, Javard R, Specchi S, et al. Effect of cardiac and respiratory cycles on vertebral heart score measured on fluoroscopic images of healthy dogs. J Am Vet Med Assoc 2015; 246: 10911097.

    • Crossref
    • PubMed
    • Search Google Scholar
    • Export Citation
  • 17. Bavegems V, Van Caelenberg AV, Duchateau L, et al. Vertebral heart size ranges specific for Whippets. Vet Radiol Ultrasound 2005; 46: 400403.

  • 18. Ghadiri A, Avizeh R, Fazli G. Vertebral heart scale of common large breeds of dogs in Iran. Int J Vet Res 2010; 4: 107111.

  • 19. Greco A, Meomartino L, Raiano V, et al. Effect of left vs right recumbency on the vertebral heart score in normal dogs. Vet Radiol Ultrasound 2008; 49: 454455.

    • Crossref
    • PubMed
    • Search Google Scholar
    • Export Citation
  • 20. Webster N, Adams V, Dennis R. The effect of manual lung inflation vs spontaneous inspiration on the cardiac silhouette in anesthetized dogs. Vet Radiol Ultrasound 2009; 50: 172177.

    • Crossref
    • PubMed
    • Search Google Scholar
    • Export Citation
  • 21. Lamb CR, Tyler M, Boswood A, et al. Assessment of the value of the vertebral heart scale in the radiographic diagnosis of cardiac disease in dogs. Vet Rec 2000; 146: 687690.

    • Crossref
    • PubMed
    • Search Google Scholar
    • Export Citation
  • 22. Woolley R, Smith P, Munro E, et al. Effects of treatment type on vertebral heart size in dogs with myxomatous mitral valve disease. Int J Appl Res Vet Med 2007; 5: 4348.

    • Search Google Scholar
    • Export Citation
  • 23. Lord P, Hansson K, Kvart C, et al. Rate of change of heart size before congestive heart failure in dogs with mitral regurgitation. J Small Anim Pract 2010; 51: 210218.

    • Crossref
    • PubMed
    • Search Google Scholar
    • Export Citation
  • 24. Gugjoo MB, Hoque M, Saxena AC, et al. Pericardial effusion in dogs: diagnostic features of radiography, electrocardiography and echocardiography. Int J Curr Res 2013; 5: 42334237.

    • Search Google Scholar
    • Export Citation
  • 25. Buchanan JW. Vertebral scale system to measure heart size in radiographs. Vet Clin North Am Small Anim Pract 2000; 30: 379393.

  • 26. Kayar A, Gonul R, Or ME, et al. M-mode echocardiographic parameters and indices in the normal German Shepherd Dog. Vet Radiol Ultrasound 2006; 47: 482486.

    • Crossref
    • PubMed
    • Search Google Scholar
    • Export Citation
  • 27. Muzzi RA, Muzzi LA, de Arau'jo RB, et al. Echocardiographic indices in normal German Shepherd Dog. J Vet Sci 2006; 7: 193198.

  • 28. Marin LM, Brown J, McBrien C, et al. Vertebral heart size in retired racing Greyhounds. Vet Radiol Ultrasound 2007; 48: 332334.

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