Long-axis fractional shortening and mitral annulus motion in dogs
Ventricular systolic dynamics involves the contraction of transverse and longitudinal myocardial fibers. Unfortunately, only the activity of the transverse myocardial fibers is foreseen by the standard systolic echocardiographic parameters. Although strain and strain rate have been used to assess th...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Universidade Estadual de Londrina
2016-10-01
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| Series: | Semina: Ciências Agrárias |
| Subjects: | |
| Online Access: | http://www.uel.br/revistas/uel/index.php/semagrarias/article/view/22752 |
| _version_ | 1818518498881568768 |
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| author | Marlos Gonçalves Sousa Fabio Nelson Gava Jorge Cardoso da Silva Filho Sheila Nogueira Saraiva da Silva Rafael Rodrigues Camacho Roberta Carareto Marcela Wolf Aparecido Antonio Camacho |
| author_facet | Marlos Gonçalves Sousa Fabio Nelson Gava Jorge Cardoso da Silva Filho Sheila Nogueira Saraiva da Silva Rafael Rodrigues Camacho Roberta Carareto Marcela Wolf Aparecido Antonio Camacho |
| author_sort | Marlos Gonçalves Sousa |
| collection | DOAJ |
| description | Ventricular systolic dynamics involves the contraction of transverse and longitudinal myocardial fibers. Unfortunately, only the activity of the transverse myocardial fibers is foreseen by the standard systolic echocardiographic parameters. Although strain and strain rate have been used to assess the radial, circumferential and longitudinal planes of cardiac contraction, such analysis requires advanced equipment which is not always available in veterinary medicine. On the contrary, some unusual parameters may be recorded via standard methodology, allowing for the specific evaluation of left ventricular longitudinal contractility. In this study, the longitudinal contractile activity was evaluated using the long-axis fractional shortening and the mitral annulus motion, which were compared with several standard echocardiographic parameters in 14 beagles, including seven with asymptomatic mitral valve disease. The long-axis fractional shortening was positively correlated with both the mitral annulus motion and the end-diastolic left-ventricular diameter. Also, a significant correlation was found to exist between the mitral annulus motion and the left-ventricular end-diastolic diameter, which is likely supportive of its preload dependency. Even though no difference was documented in either mitral annulus motion or long-axis fractional shortening between healthy dogs and dogs with mitral valve disease, the latter only included animals with minimal cardiac remodeling, with no overt compromise of systolic function. Since it is possible to obtain these two parameters with any echocardiographic equipment, their inclusion in the routine exam would probably add information regarding the activity of the longitudinal myocardial fibers, whose functional deterioration supposedly occurs prior to the impairment of transverse fibers. |
| first_indexed | 2024-12-11T01:10:53Z |
| format | Article |
| id | doaj.art-8b73081ce05a4a41bd8b4d6a28b91fcb |
| institution | Directory Open Access Journal |
| issn | 1676-546X 1679-0359 |
| language | English |
| last_indexed | 2024-12-11T01:10:53Z |
| publishDate | 2016-10-01 |
| publisher | Universidade Estadual de Londrina |
| record_format | Article |
| series | Semina: Ciências Agrárias |
| spelling | doaj.art-8b73081ce05a4a41bd8b4d6a28b91fcb2022-12-22T01:26:02ZengUniversidade Estadual de LondrinaSemina: Ciências Agrárias1676-546X1679-03592016-10-013753115312410.5433/1679-0359.2016v37n5p311514524Long-axis fractional shortening and mitral annulus motion in dogsMarlos Gonçalves Sousa0Fabio Nelson Gava1Jorge Cardoso da Silva Filho2Sheila Nogueira Saraiva da Silva3Rafael Rodrigues Camacho4Roberta Carareto5Marcela Wolf6Aparecido Antonio Camacho7Universidade Federal do ParanáUniversidade Estadual PaulistaUniversidade Estadual PaulistaUniversidade Estadual PaulistaUniversidade Estadual PaulistaUniversidade Federal do ParanáUniversidade Federal do ParanáUniversidade Estadual PaulistaVentricular systolic dynamics involves the contraction of transverse and longitudinal myocardial fibers. Unfortunately, only the activity of the transverse myocardial fibers is foreseen by the standard systolic echocardiographic parameters. Although strain and strain rate have been used to assess the radial, circumferential and longitudinal planes of cardiac contraction, such analysis requires advanced equipment which is not always available in veterinary medicine. On the contrary, some unusual parameters may be recorded via standard methodology, allowing for the specific evaluation of left ventricular longitudinal contractility. In this study, the longitudinal contractile activity was evaluated using the long-axis fractional shortening and the mitral annulus motion, which were compared with several standard echocardiographic parameters in 14 beagles, including seven with asymptomatic mitral valve disease. The long-axis fractional shortening was positively correlated with both the mitral annulus motion and the end-diastolic left-ventricular diameter. Also, a significant correlation was found to exist between the mitral annulus motion and the left-ventricular end-diastolic diameter, which is likely supportive of its preload dependency. Even though no difference was documented in either mitral annulus motion or long-axis fractional shortening between healthy dogs and dogs with mitral valve disease, the latter only included animals with minimal cardiac remodeling, with no overt compromise of systolic function. Since it is possible to obtain these two parameters with any echocardiographic equipment, their inclusion in the routine exam would probably add information regarding the activity of the longitudinal myocardial fibers, whose functional deterioration supposedly occurs prior to the impairment of transverse fibers.http://www.uel.br/revistas/uel/index.php/semagrarias/article/view/22752Left ventricleSystolic functionEchocardiogramLongitudinal contractilityEndocardiosis. |
| spellingShingle | Marlos Gonçalves Sousa Fabio Nelson Gava Jorge Cardoso da Silva Filho Sheila Nogueira Saraiva da Silva Rafael Rodrigues Camacho Roberta Carareto Marcela Wolf Aparecido Antonio Camacho Long-axis fractional shortening and mitral annulus motion in dogs Semina: Ciências Agrárias Left ventricle Systolic function Echocardiogram Longitudinal contractility Endocardiosis. |
| title | Long-axis fractional shortening and mitral annulus motion in dogs |
| title_full | Long-axis fractional shortening and mitral annulus motion in dogs |
| title_fullStr | Long-axis fractional shortening and mitral annulus motion in dogs |
| title_full_unstemmed | Long-axis fractional shortening and mitral annulus motion in dogs |
| title_short | Long-axis fractional shortening and mitral annulus motion in dogs |
| title_sort | long axis fractional shortening and mitral annulus motion in dogs |
| topic | Left ventricle Systolic function Echocardiogram Longitudinal contractility Endocardiosis. |
| url | http://www.uel.br/revistas/uel/index.php/semagrarias/article/view/22752 |
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