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Echocardiographic measurements of right heart size and function in healthy horses

Annelies Decloedt (UGent) , Dominique De Clercq (UGent) , Sofie Ven (UGent) , Nicky Van Der Vekens (UGent) , Stanislas Sys (UGent) , Barbara Broux (UGent) and Gunther van Loon (UGent)
(2017) EQUINE VETERINARY JOURNAL. 49(1). p.58-64
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Abstract
Reasons for performing study: Right ventricular (RV) function is scarcely described in horses. Objectives: To establish reliable echocardiographic measurements of right heart size and function in horses. Study design: Descriptive study in healthy horses. Methods: Ten healthy untrained adult trotter horses underwent repeated echocardiography performed by 2 sonographers from right and left parasternal standard and nonstandard views. Nonstandard views included a right parasternal view focused on the right atrium, left parasternal long-axis pulmonary artery view, left parasternal long-axis view focused on the right ventricle including anatomical M-mode of tricuspid annular motion and left parasternal pulsed wave Doppler recording of pulmonary flow. During off-line analysis, 2 observers performed two-dimensional, M-mode, pulsed wave Doppler, tissue Doppler imaging (TDI) and two-dimensional speckle tracking (2DST) measurements of RV size and function. Acquisition and measurement variability were assessed by calculating coefficients of variation (CV) from one-way repeated measures analyses of variance. The degree of variability was classified as low (CV<15%), moderate (CV 15-25%) or high (CV>25%). Results: Most two-dimensional and M-mode measurements of RV, right atrial and pulmonary artery size showed low variability. The two-dimensional, M-mode and pulsed wave Doppler measurements of RV function showed a low to moderate variability. Right ventricular functional measurements by 2DST showed low variability, except for segmental strain rate. Right ventricular functional measurements by TDI showed a low to high variability, with a lower variability for timing than for peak measurements and a lower variability for velocity compared with deformation measurements. Conclusions: Right heart size and function can be assessed with low variability in horses.
Keywords
tissue Doppler, speckle tracking, horse, ultrasound, pulmonary artery, RECURRENT AIRWAY-OBSTRUCTION, WALL-MOTION, DOPPLER ECHOCARDIOGRAPHY, SPECKLE TRACKING, RIGHT VENTRICLE, STRAIN-RATE, M-MODE, QUANTIFICATION, DISPLACEMENT, VARIABILITY

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Chicago
Decloedt, Annelies, Dominique De Clercq, Sofie Ven, Nicky Van Der Vekens, Stanislas Sys, Barbara Broux, and Gunther van Loon. 2017. “Echocardiographic Measurements of Right Heart Size and Function in Healthy Horses.” Equine Veterinary Journal 49 (1): 58–64.
APA
Decloedt, Annelies, De Clercq, D., Ven, S., Van Der Vekens, N., Sys, S., Broux, B., & van Loon, G. (2017). Echocardiographic measurements of right heart size and function in healthy horses. EQUINE VETERINARY JOURNAL, 49(1), 58–64.
Vancouver
1.
Decloedt A, De Clercq D, Ven S, Van Der Vekens N, Sys S, Broux B, et al. Echocardiographic measurements of right heart size and function in healthy horses. EQUINE VETERINARY JOURNAL. 2017;49(1):58–64.
MLA
Decloedt, Annelies, Dominique De Clercq, Sofie Ven, et al. “Echocardiographic Measurements of Right Heart Size and Function in Healthy Horses.” EQUINE VETERINARY JOURNAL 49.1 (2017): 58–64. Print.
@article{7259836,
  abstract     = {Reasons for performing study: Right ventricular (RV) function is scarcely described in horses. 
Objectives: To establish reliable echocardiographic measurements of right heart size and function in horses. 
Study design: Descriptive study in healthy horses. 
Methods: Ten healthy untrained adult trotter horses underwent repeated echocardiography performed by 2 sonographers from right and left parasternal standard and nonstandard views. Nonstandard views included a right parasternal view focused on the right atrium, left parasternal long-axis pulmonary artery view, left parasternal long-axis view focused on the right ventricle including anatomical M-mode of tricuspid annular motion and left parasternal pulsed wave Doppler recording of pulmonary flow. During off-line analysis, 2 observers performed two-dimensional, M-mode, pulsed wave Doppler, tissue Doppler imaging (TDI) and two-dimensional speckle tracking (2DST) measurements of RV size and function. Acquisition and measurement variability were assessed by calculating coefficients of variation (CV) from one-way repeated measures analyses of variance. The degree of variability was classified as low (CV{\textlangle}15\%), moderate (CV 15-25\%) or high (CV{\textrangle}25\%). 
Results: Most two-dimensional and M-mode measurements of RV, right atrial and pulmonary artery size showed low variability. The two-dimensional, M-mode and pulsed wave Doppler measurements of RV function showed a low to moderate variability. Right ventricular functional measurements by 2DST showed low variability, except for segmental strain rate. Right ventricular functional measurements by TDI showed a low to high variability, with a lower variability for timing than for peak measurements and a lower variability for velocity compared with deformation measurements. 
Conclusions: Right heart size and function can be assessed with low variability in horses.},
  author       = {Decloedt, Annelies and De Clercq, Dominique and Ven, Sofie and Van Der Vekens, Nicky and Sys, Stanislas and Broux, Barbara and van Loon, Gunther},
  issn         = {0425-1644},
  journal      = {EQUINE VETERINARY JOURNAL},
  language     = {eng},
  number       = {1},
  pages        = {58--64},
  title        = {Echocardiographic measurements of right heart size and function in healthy horses},
  url          = {http://dx.doi.org/10.1111/evj.12554},
  volume       = {49},
  year         = {2017},
}

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