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Feasibility and reference intervals assessed by conventional and speckle‐tracking echocardiography in normal hamsters
OBJECTIVES: This study aimed to determine feasibility, reference intervals, and reproducibility of left ventricular ejection fraction (LVEF) and speckle‐tracking echocardiography (STE) in adult Syrian hamsters. BACKGROUND: Syrian hamster is an experimental model for several heart diseases. Echocardi...
Autores principales: | , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
John Wiley and Sons Inc.
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7923569/ https://www.ncbi.nlm.nih.gov/pubmed/33650789 http://dx.doi.org/10.14814/phy2.14776 |
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author | Barros Filho, Antonio C. L. Moreira, Henrique T. Dias, Beatriz P. Ribeiro, Fernando F. F. Tanaka, Denise M. Schmidt, André Maciel, Benedito C. Simões, Marcus V. Marin‐Neto, José A. Romano, Minna M. D. |
author_facet | Barros Filho, Antonio C. L. Moreira, Henrique T. Dias, Beatriz P. Ribeiro, Fernando F. F. Tanaka, Denise M. Schmidt, André Maciel, Benedito C. Simões, Marcus V. Marin‐Neto, José A. Romano, Minna M. D. |
author_sort | Barros Filho, Antonio C. L. |
collection | PubMed |
description | OBJECTIVES: This study aimed to determine feasibility, reference intervals, and reproducibility of left ventricular ejection fraction (LVEF) and speckle‐tracking echocardiography (STE) in adult Syrian hamsters. BACKGROUND: Syrian hamster is an experimental model for several heart diseases. Echocardiography allows the evaluation of structure and function with bidimensional conventional techniques and STE. However, there is no data regarding reference values for bidimensional LVEF and myocardial strain in hamsters. METHODS: A total of 135 female Syrian hamsters were anesthetized and studied with a small animal dedicated echocardiography system. Echocardiography measurements were obtained from M‐mode and B‐mode images. Feasibility and 95% reference intervals were obtained for LVEF using three different approaches: LVEF_Teichholz (from M‐mode linear measurements), LVEF_BMode (from area‐length method), and LVEF_ STE (from strain), and for global longitudinal (GLS), circumferential (GCS), and radial (GRS) endocardial strain. Reproducibility was assessed as intra‐class correlation coefficients. RESULTS: Feasibility of LVEF and endocardial strain was high (95% in FEVE_Teichholz, 93% in the LVEF_BMode, 84% in the LVEF_STE, 84% from PSLAX, and 80% from PSSAX). Values of LVEF_Teichholz were significantly higher than values of LVEF_BMode, and LVEF_STE‐derived methods (59.0 ± 5.8, 53.8 ± 4.7, 46.3 ± 5.7, p < 0.0001). The 95% reference intervals for GLS, GCS, and GRS were respectively −13.6(−7.5;‐20.4)%, −20.5 ± 3.1%, and + 34,7 ± 7.0%. Intra‐class correlation coefficients were 0.49 – 0.91 for LVEF measurements, 0.73 – 0.92 for STE, with better results for LVEF_Teichholz and GLS. CONCLUSIONS: Evaluation of LVEF by several methods and STE parameters is feasible in hamsters. Reference intervals for LVEF and STE obtained for this experimental animal model can be applied at future research. |
format | Online Article Text |
id | pubmed-7923569 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | John Wiley and Sons Inc. |
record_format | MEDLINE/PubMed |
spelling | pubmed-79235692021-03-12 Feasibility and reference intervals assessed by conventional and speckle‐tracking echocardiography in normal hamsters Barros Filho, Antonio C. L. Moreira, Henrique T. Dias, Beatriz P. Ribeiro, Fernando F. F. Tanaka, Denise M. Schmidt, André Maciel, Benedito C. Simões, Marcus V. Marin‐Neto, José A. Romano, Minna M. D. Physiol Rep Original Articles OBJECTIVES: This study aimed to determine feasibility, reference intervals, and reproducibility of left ventricular ejection fraction (LVEF) and speckle‐tracking echocardiography (STE) in adult Syrian hamsters. BACKGROUND: Syrian hamster is an experimental model for several heart diseases. Echocardiography allows the evaluation of structure and function with bidimensional conventional techniques and STE. However, there is no data regarding reference values for bidimensional LVEF and myocardial strain in hamsters. METHODS: A total of 135 female Syrian hamsters were anesthetized and studied with a small animal dedicated echocardiography system. Echocardiography measurements were obtained from M‐mode and B‐mode images. Feasibility and 95% reference intervals were obtained for LVEF using three different approaches: LVEF_Teichholz (from M‐mode linear measurements), LVEF_BMode (from area‐length method), and LVEF_ STE (from strain), and for global longitudinal (GLS), circumferential (GCS), and radial (GRS) endocardial strain. Reproducibility was assessed as intra‐class correlation coefficients. RESULTS: Feasibility of LVEF and endocardial strain was high (95% in FEVE_Teichholz, 93% in the LVEF_BMode, 84% in the LVEF_STE, 84% from PSLAX, and 80% from PSSAX). Values of LVEF_Teichholz were significantly higher than values of LVEF_BMode, and LVEF_STE‐derived methods (59.0 ± 5.8, 53.8 ± 4.7, 46.3 ± 5.7, p < 0.0001). The 95% reference intervals for GLS, GCS, and GRS were respectively −13.6(−7.5;‐20.4)%, −20.5 ± 3.1%, and + 34,7 ± 7.0%. Intra‐class correlation coefficients were 0.49 – 0.91 for LVEF measurements, 0.73 – 0.92 for STE, with better results for LVEF_Teichholz and GLS. CONCLUSIONS: Evaluation of LVEF by several methods and STE parameters is feasible in hamsters. Reference intervals for LVEF and STE obtained for this experimental animal model can be applied at future research. John Wiley and Sons Inc. 2021-03-02 /pmc/articles/PMC7923569/ /pubmed/33650789 http://dx.doi.org/10.14814/phy2.14776 Text en © 2021 The Authors. Physiological Reports published by Wiley Periodicals LLC on behalf of The Physiological Society and the American Physiological Society This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Original Articles Barros Filho, Antonio C. L. Moreira, Henrique T. Dias, Beatriz P. Ribeiro, Fernando F. F. Tanaka, Denise M. Schmidt, André Maciel, Benedito C. Simões, Marcus V. Marin‐Neto, José A. Romano, Minna M. D. Feasibility and reference intervals assessed by conventional and speckle‐tracking echocardiography in normal hamsters |
title | Feasibility and reference intervals assessed by conventional and speckle‐tracking echocardiography in normal hamsters |
title_full | Feasibility and reference intervals assessed by conventional and speckle‐tracking echocardiography in normal hamsters |
title_fullStr | Feasibility and reference intervals assessed by conventional and speckle‐tracking echocardiography in normal hamsters |
title_full_unstemmed | Feasibility and reference intervals assessed by conventional and speckle‐tracking echocardiography in normal hamsters |
title_short | Feasibility and reference intervals assessed by conventional and speckle‐tracking echocardiography in normal hamsters |
title_sort | feasibility and reference intervals assessed by conventional and speckle‐tracking echocardiography in normal hamsters |
topic | Original Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7923569/ https://www.ncbi.nlm.nih.gov/pubmed/33650789 http://dx.doi.org/10.14814/phy2.14776 |
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