Left ventricular volume determination in the horse by two-dimensional echocardiography: an in vitro study.
Abstract: This study was designed to evaluate the accuracy of two-dimensional echocardiography (2DE) in determining the left ventricular volume (LVV) of the horse in vitro. After examining the shape of the left ventricular silicon rubber casts of four equine hearts, two modified Simpson's rule methods (Model A and Model B) as combinations of conical shapes and one biplane area-length method as a single cone (Model C) were chosen for volume calculations. One long axis and three short axis planes were used for linear and area 2DE measurements, respectively. The ventricular length (L) was calculated from the chordal length (CL) by using a linear regression equation (L = 5.54 + 1.83 CL) obtained by anatomical measurement of these two parameters on 40 normal hearts. The LVV was calculated in 15 formalin-fixed hearts from 2DE measurements with the three geometric models. Left ventricular casts were then made using silicon rubber, and their volumes were determined by water displacement. The calculated volumes were plotted against cast volumes with linear regression analysis. All calculated LVVs correlated well with the cast LVVs (R = 0.921 to 0.957; P less than 0.001). The highest correlation was provided by Model A which best represented the shape of the left ventricle. This model consisted of a truncated cone bordered by the area at the level of the mitral valve and by the area at the level of the chordae tendineae, plus a cone the base of which was the area at the level of the papillary muscles. The results demonstrate the applicability of 2DE for equine LVV determinations in vitro, similar to other species.(ABSTRACT TRUNCATED AT 250 WORDS)
Publication Date: 1990-11-01 PubMed ID: 2269261DOI: 10.1111/j.2042-3306.1990.tb04303.xGoogle Scholar: Lookup
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- Journal Article
- Research Support
- Non-U.S. Gov't
Summary
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The research article investigates the accuracy of a specific imaging technique, two-dimensional echocardiography (2DE), in measuring the volume of the left ventricle of a horse’s heart in laboratory conditions. The study also analyses the representational accuracy of three geometric models in calculating ventricular volumes.
Research Objective and Methods
- The study aims to evaluate the accuracy of two-dimensional echocardiography (2DE) in determining the left ventricular volume (LVV) of an in vitro horse heart.
- The researchers examined the shapes of silicon rubber casts of four equine hearts to study their anatomical details.
- Three geometric models, two modified Simpson’s rule methods (Model A and Model B) and a single cone biplane area-length method (Model C), were used to calculate the ventricular volumes.
Data Collection
- The researchers utilized a long-axis and three short axis planes for the linear and area 2DE measurements, respectively.
- The length of the ventricle was calculated using an equation derived from the anatomical measurement of the ventricular length and chord length parameters on 40 normal hearts.
- The LVV was calculated from 2DE measurements on 15 formalin-fixed hearts using the three geometric models.
Verification Process
- Following the calculations, silicon rubber casts of the left ventricle were made, and their volumes were physically examined using water displacement.
- The calculated volumes and the cast volumes were compared statistically using linear regression analysis.
Results
- The results showed a high correlation between the calculated LVVs and the actual volumes of the casts, signifying the accuracy of the 2DE measurements and the chosen geometric models.
- Among the three models, Model A, which structurally best represented the left ventricle, provided the highest correlation.
- Model A comprised a truncated cone bordered by the mitral valve and the chordae tendineae areas, and a cone based on the papillary muscles area.
- The results underscore the viability of 2DE for ascertaining LVV of equine hearts under laboratory conditions, mirroring its feasibility in other species.
Cite This Article
APA
Vörös K, Holmes JR, Gibbs C.
(1990).
Left ventricular volume determination in the horse by two-dimensional echocardiography: an in vitro study.
Equine Vet J, 22(6), 398-402.
https://doi.org/10.1111/j.2042-3306.1990.tb04303.x Publication
Researcher Affiliations
- Department of Veterinary Surgery, University of Bristol, School of Veterinary Science, UK.
MeSH Terms
- Animals
- Echocardiography / veterinary
- Female
- Heart / anatomy & histology
- Heart Ventricles / diagnostic imaging
- Horses / anatomy & histology
- In Vitro Techniques
- Male
- Organ Size
- Regression Analysis
Grant Funding
- Wellcome Trust
Citations
This article has been cited 1 times.- Demaria R, Godlewski G, De Guilhermier P, Tang J, Seguin J, Chaptal PA. Static morphometric bases for CT identification and evaluation of the outflow chamber of the left ventricle. Preliminary study in formalin-fixed heart. Surg Radiol Anat 1993;15(2):145-50.
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