Comparison of fluoroscopic cardiovascular measurements from healthy dogs obtained at end-diastole and end-systole

Quantitative measurements are commonly implemented to objectively evaluate heart size in dogs. However, recent studies suggest that the phase of cardiac cycle can impact vertebral heart score, thereby potentially influencing clinical management. This study used fluoroscopy to assess the impact of th...

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Bibliographic Details
Published in:Journal of veterinary cardiology 2020-06, Vol.29, p.1-10
Main Authors: Brown, C.S., Johnson, L.R., Visser, L.C., Chan, J.C., Pollard, R.E.
Format: Article
Language:English
Subjects:
Animals
Atrial size
Cardiothoracic
Diastole
Dogs - anatomy & histology
Female
Fluoroscopy
Fluoroscopy - veterinary
Heart - diagnostic imaging
Heart score
Imaging
Male
Prospective Studies
Quantitative
Reference Values
Systole
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Summary:Quantitative measurements are commonly implemented to objectively evaluate heart size in dogs. However, recent studies suggest that the phase of cardiac cycle can impact vertebral heart score, thereby potentially influencing clinical management. This study used fluoroscopy to assess the impact of the cardiac cycle on quantitative cardiovascular measurements in healthy dogs of various breeds. This was a prospective study. Multiple cardiac and respiratory cycles were recorded fluoroscopically. Peak inspiratory end-systole and end-diastole frames were captured from 49 dogs in right lateral recumbency. Vertebral heart score (VHS), cardiothoracic ratio (CTR), vertebral left atrial size (VLAS), and caudal vena cava diameter ratio (CVCDR) measurements were performed. Mean cardiac measurements were compared between cardiac cycle phases, and the impact of body condition score (BCS), weight, thoracic conformation, sex, and age was evaluated. Cardiac cycle had a significant impact on VHS (mean difference: 0.36 ± 0.14 vertebral units between systole and diastole; p 
ISSN:1760-2734
1875-0834
DOI:10.1016/j.jvc.2020.02.004