Radiographic cardiac size in cats and dogs with heartworm disease compared with reference values using the vertebral heart scale method: 53 cases

Litster, Annette, Atkins, Clarke, Atwell, Rick and Buchanan, James (2005) Radiographic cardiac size in cats and dogs with heartworm disease compared with reference values using the vertebral heart scale method: 53 cases. Journal of Veterinary Cardiology, 7 1: 33-40. doi:10.1016/j.jvc.2005.02.002


Author Litster, Annette
Atkins, Clarke
Atwell, Rick
Buchanan, James
Title Radiographic cardiac size in cats and dogs with heartworm disease compared with reference values using the vertebral heart scale method: 53 cases
Journal name Journal of Veterinary Cardiology   Check publisher's open access policy
ISSN 1760-2734
1875-0834
Publication date 2005-05
Sub-type Article (original research)
DOI 10.1016/j.jvc.2005.02.002
Volume 7
Issue 1
Start page 33
End page 40
Total pages 8
Editor Valerie Chetboul
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Collection year 2005
Subject C1
300501 Veterinary Medicine
780105 Biological sciences
Formatted abstract
Objectives: To measure the size of the heart, caudal vena cava and right pulmonary artery (cats) or right caudal lobar artery (dogs) using the vertebral scale method in heartworm-infected cats and dogs and compare the results with reference values.

Background: The vertebral heart scale (VHS) method is an objective measure of heart size relative to body size.

Animals: Thoracic radiographs from heartworm-infected cats (n = 28) and dogs (n = 25).

Materials and methods: Standardized measurements using a previously published method were made using lateral, dorsoventral and/or ventrodorsal thoracic radiographs.

Results: On lateral radiographs, the mean VHS for the heartworm-infected group was significantly larger than the reference value for both cats and dogs (cats p = 0.009, dogs p < 0.001). On lateral radiographs of both infected cats and dogs, there was a significant correlation between mean diameter of the caudal vena cava and VHS (cats p = 0.002, r = 0.59; dogs p = 0.012, r = 0.53). The mean ratio of the width of the right pulmonary artery (cats) or right caudal lobar artery (dogs) to the width of rib 9 was higher than reference values for each species.

Conclusions: Heartworm-infected cats and dogs often have an enlarged cardiac silhouette on thoracic radiographs. The VHS method, measurement of the caudal vena cava expressed in vertebral lengths, and the calculation of the ratio of the right pulmonary or caudal lobar artery width to rib 9 width are all useful tools to monitor the natural history of the disease and aid in staging for therapy of heartworm disease.
Keyword Radiographic
Cardiac
Cats
Dogs
Heartworm
Heart scale
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2006 Higher Education Research Data Collection
ERA 2012 Admin Only
School of Veterinary Science Publications
 
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Created: Wed, 15 Aug 2007, 07:21:26 EST