Study of the traction resistance of mitral valve chordae tendineae Estudo da resistência à tração das cordas da valva mitral
OBJECTIVE: To determinate the extension and the resistance of the primary mitral valve chordae tendineae when submitted to traction. The importance of keeping the integrity of papillary muscle, chordae tendineae, and mitral valve cuspid when the replacement of this valve occurs is clear, but the kno...
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Gespeichert in:
| Autor*in: |
Frederico Lafraia Lobo [verfasserIn] Flávio Roberto Takeda [verfasserIn] Carlos Manuel de Almeida Brandão [verfasserIn] Domingo Marcolino Braile [verfasserIn] Fabio Biscegli Jatene [verfasserIn] Pablo Maria Alberto Pomerantzeff [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2006 |
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| Übergeordnetes Werk: |
In: Clinics - Elsevier España, 2005, 61(2006), 5, Seite 395-400 |
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| Übergeordnetes Werk: |
volume:61 ; year:2006 ; number:5 ; pages:395-400 |
| Links: |
Link aufrufen |
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| DOI / URN: |
10.1590/S1807-59322006000500005 |
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| Katalog-ID: |
DOAJ028890426 |
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| 245 | 1 | 0 | |a Study of the traction resistance of mitral valve chordae tendineae Estudo da resistência à tração das cordas da valva mitral |
| 264 | 1 | |c 2006 | |
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| 520 | |a OBJECTIVE: To determinate the extension and the resistance of the primary mitral valve chordae tendineae when submitted to traction. The importance of keeping the integrity of papillary muscle, chordae tendineae, and mitral valve cuspid when the replacement of this valve occurs is clear, but the knowledge of the maximum resistance that a primary tendinea chorda can withstand is not known. METHODS: Eight hearts were dissected, and one hundred and thirty two primary human chordae tendineae were measured (length and thickness) and submitted to traction under controlled conditions so that the absolute resistance, resistance relative to thickness (relative resistance), and elongation could be measured. RESULTS: The correlation between the elongation at the moment of rupture and the thickness was equal to 1.54 + 17.02 x thickness (P = 0.026); and to absolute resistance was equal to 0.95 + 1.42 x resistance (P < 0.001); and to the resistance relative to thickness (relative resistance) was equal to 1.95 + 0.08 x relative resistance (P = 0.009). The correlation between the absolute resistance and the thickness was equal to 0.26 + 14.53 x thickness (P < 0.001). CONCLUSION: The resistance of primary mitral valve chordae tendineae is associated with its thickness and elongation at the moment of rupture, but is not associated with the length. The elongation at the moment of rupture shows a relationship with the resistance relative to thickness (relative resistance) and with the thickness of the primary chordae tendineae, but not with the length of the chordae tendineae.<br<OBJETIVO: Determinar o alongamento e a resistência à tração das cordas tendíneas primárias humanas da valva mitral cardíaca. Sabe-se da importância de se manter a integridade do músculo papilar, corda tendínea e cúspide da valva mitral, quando da substituição desta valva, mas não se tem conhecimento da resistência máxima que uma corda tendínea primaria pode sofrer resistência máxima que uma corda tendínea apresenta. MÉTODO: Foram dissecados 8 corações que permitiram a tração de cento e trinta e duas cordas tendíneas primárias humanas. Foram dissecados 8 corações que permitiram a tração de cento e trinta e duas cordas tendíneas primárias humanas, as quais foram medidas (comprimento e espessura) e submetidas a trações em condições controladas, e assim a resistência absoluta, a resistência relativa a espessura (resistência relativa) e o alongamento puderam ser medidos. RESULTADOS: A correlação entre alongamento no momento da ruptura e espessura foi igual a 1,54 + 17,02*espessura (p=0,026); e à resistência absoluta foi igual a 0,95 + 1,42*resistência (p<0,001); e à resistência relativa à espessura foi igual a 1,95 + 0,08*resistência relativa (p=0,009). A correlação entre resistência absoluta e espessura foi igual a 0,26 + 14,53*espessura (p<0,001). CONCLUSÃO: A resistência da corda tendínea primaria humana da valva mitral está relacionada com sua espessura e com o alongamento no momento da ruptura à tração, não estando relacionada ao seu comprimento; e que o alongamento no momento da ruptura apresenta correlação com a resistência relativa à espessura e com a espessura da corda tendínea primaria humana, não estando relacionada com o comprimento da mesma. | ||
| 650 | 4 | |a Cordoalha | |
| 650 | 4 | |a Corda Tendinea | |
| 650 | 4 | |a Valva Mitral | |
| 650 | 4 | |a Aparelho atrio-ventricular | |
| 650 | 4 | |a Resistência | |
| 650 | 4 | |a Alongamento | |
| 650 | 4 | |a Chordae Tendineae | |
| 650 | 4 | |a Mitral Valve | |
| 650 | 4 | |a Left Atrioventricular Apparatus | |
| 650 | 4 | |a Elongation | |
| 650 | 4 | |a Stretching Resistance | |
| 653 | 0 | |a Medicine (General) | |
| 700 | 0 | |a Flávio Roberto Takeda |e verfasserin |4 aut | |
| 700 | 0 | |a Carlos Manuel de Almeida Brandão |e verfasserin |4 aut | |
| 700 | 0 | |a Domingo Marcolino Braile |e verfasserin |4 aut | |
| 700 | 0 | |a Fabio Biscegli Jatene |e verfasserin |4 aut | |
| 700 | 0 | |a Pablo Maria Alberto Pomerantzeff |e verfasserin |4 aut | |
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10.1590/S1807-59322006000500005 doi (DE-627)DOAJ028890426 (DE-599)DOAJ72f0ae0c59424417883d0669c6344c88 DE-627 ger DE-627 rakwb eng R5-920 Frederico Lafraia Lobo verfasserin aut Study of the traction resistance of mitral valve chordae tendineae Estudo da resistência à tração das cordas da valva mitral 2006 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier OBJECTIVE: To determinate the extension and the resistance of the primary mitral valve chordae tendineae when submitted to traction. The importance of keeping the integrity of papillary muscle, chordae tendineae, and mitral valve cuspid when the replacement of this valve occurs is clear, but the knowledge of the maximum resistance that a primary tendinea chorda can withstand is not known. METHODS: Eight hearts were dissected, and one hundred and thirty two primary human chordae tendineae were measured (length and thickness) and submitted to traction under controlled conditions so that the absolute resistance, resistance relative to thickness (relative resistance), and elongation could be measured. RESULTS: The correlation between the elongation at the moment of rupture and the thickness was equal to 1.54 + 17.02 x thickness (P = 0.026); and to absolute resistance was equal to 0.95 + 1.42 x resistance (P < 0.001); and to the resistance relative to thickness (relative resistance) was equal to 1.95 + 0.08 x relative resistance (P = 0.009). The correlation between the absolute resistance and the thickness was equal to 0.26 + 14.53 x thickness (P < 0.001). CONCLUSION: The resistance of primary mitral valve chordae tendineae is associated with its thickness and elongation at the moment of rupture, but is not associated with the length. The elongation at the moment of rupture shows a relationship with the resistance relative to thickness (relative resistance) and with the thickness of the primary chordae tendineae, but not with the length of the chordae tendineae.<br<OBJETIVO: Determinar o alongamento e a resistência à tração das cordas tendíneas primárias humanas da valva mitral cardíaca. Sabe-se da importância de se manter a integridade do músculo papilar, corda tendínea e cúspide da valva mitral, quando da substituição desta valva, mas não se tem conhecimento da resistência máxima que uma corda tendínea primaria pode sofrer resistência máxima que uma corda tendínea apresenta. MÉTODO: Foram dissecados 8 corações que permitiram a tração de cento e trinta e duas cordas tendíneas primárias humanas. Foram dissecados 8 corações que permitiram a tração de cento e trinta e duas cordas tendíneas primárias humanas, as quais foram medidas (comprimento e espessura) e submetidas a trações em condições controladas, e assim a resistência absoluta, a resistência relativa a espessura (resistência relativa) e o alongamento puderam ser medidos. RESULTADOS: A correlação entre alongamento no momento da ruptura e espessura foi igual a 1,54 + 17,02*espessura (p=0,026); e à resistência absoluta foi igual a 0,95 + 1,42*resistência (p<0,001); e à resistência relativa à espessura foi igual a 1,95 + 0,08*resistência relativa (p=0,009). A correlação entre resistência absoluta e espessura foi igual a 0,26 + 14,53*espessura (p<0,001). CONCLUSÃO: A resistência da corda tendínea primaria humana da valva mitral está relacionada com sua espessura e com o alongamento no momento da ruptura à tração, não estando relacionada ao seu comprimento; e que o alongamento no momento da ruptura apresenta correlação com a resistência relativa à espessura e com a espessura da corda tendínea primaria humana, não estando relacionada com o comprimento da mesma. Cordoalha Corda Tendinea Valva Mitral Aparelho atrio-ventricular Resistência Alongamento Chordae Tendineae Mitral Valve Left Atrioventricular Apparatus Elongation Stretching Resistance Medicine (General) Flávio Roberto Takeda verfasserin aut Carlos Manuel de Almeida Brandão verfasserin aut Domingo Marcolino Braile verfasserin aut Fabio Biscegli Jatene verfasserin aut Pablo Maria Alberto Pomerantzeff verfasserin aut In Clinics Elsevier España, 2005 61(2006), 5, Seite 395-400 (DE-627)507908244 (DE-600)2222974-7 19805322 nnns volume:61 year:2006 number:5 pages:395-400 https://doi.org/10.1590/S1807-59322006000500005 kostenfrei https://doaj.org/article/72f0ae0c59424417883d0669c6344c88 kostenfrei http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1807-59322006000500005 kostenfrei https://doaj.org/toc/1807-5932 Journal toc kostenfrei https://doaj.org/toc/1980-5322 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2088 GBV_ILN_2106 GBV_ILN_2110 GBV_ILN_2112 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4393 GBV_ILN_4700 AR 61 2006 5 395-400 |
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10.1590/S1807-59322006000500005 doi (DE-627)DOAJ028890426 (DE-599)DOAJ72f0ae0c59424417883d0669c6344c88 DE-627 ger DE-627 rakwb eng R5-920 Frederico Lafraia Lobo verfasserin aut Study of the traction resistance of mitral valve chordae tendineae Estudo da resistência à tração das cordas da valva mitral 2006 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier OBJECTIVE: To determinate the extension and the resistance of the primary mitral valve chordae tendineae when submitted to traction. The importance of keeping the integrity of papillary muscle, chordae tendineae, and mitral valve cuspid when the replacement of this valve occurs is clear, but the knowledge of the maximum resistance that a primary tendinea chorda can withstand is not known. METHODS: Eight hearts were dissected, and one hundred and thirty two primary human chordae tendineae were measured (length and thickness) and submitted to traction under controlled conditions so that the absolute resistance, resistance relative to thickness (relative resistance), and elongation could be measured. RESULTS: The correlation between the elongation at the moment of rupture and the thickness was equal to 1.54 + 17.02 x thickness (P = 0.026); and to absolute resistance was equal to 0.95 + 1.42 x resistance (P < 0.001); and to the resistance relative to thickness (relative resistance) was equal to 1.95 + 0.08 x relative resistance (P = 0.009). The correlation between the absolute resistance and the thickness was equal to 0.26 + 14.53 x thickness (P < 0.001). CONCLUSION: The resistance of primary mitral valve chordae tendineae is associated with its thickness and elongation at the moment of rupture, but is not associated with the length. The elongation at the moment of rupture shows a relationship with the resistance relative to thickness (relative resistance) and with the thickness of the primary chordae tendineae, but not with the length of the chordae tendineae.<br<OBJETIVO: Determinar o alongamento e a resistência à tração das cordas tendíneas primárias humanas da valva mitral cardíaca. Sabe-se da importância de se manter a integridade do músculo papilar, corda tendínea e cúspide da valva mitral, quando da substituição desta valva, mas não se tem conhecimento da resistência máxima que uma corda tendínea primaria pode sofrer resistência máxima que uma corda tendínea apresenta. MÉTODO: Foram dissecados 8 corações que permitiram a tração de cento e trinta e duas cordas tendíneas primárias humanas. Foram dissecados 8 corações que permitiram a tração de cento e trinta e duas cordas tendíneas primárias humanas, as quais foram medidas (comprimento e espessura) e submetidas a trações em condições controladas, e assim a resistência absoluta, a resistência relativa a espessura (resistência relativa) e o alongamento puderam ser medidos. RESULTADOS: A correlação entre alongamento no momento da ruptura e espessura foi igual a 1,54 + 17,02*espessura (p=0,026); e à resistência absoluta foi igual a 0,95 + 1,42*resistência (p<0,001); e à resistência relativa à espessura foi igual a 1,95 + 0,08*resistência relativa (p=0,009). A correlação entre resistência absoluta e espessura foi igual a 0,26 + 14,53*espessura (p<0,001). CONCLUSÃO: A resistência da corda tendínea primaria humana da valva mitral está relacionada com sua espessura e com o alongamento no momento da ruptura à tração, não estando relacionada ao seu comprimento; e que o alongamento no momento da ruptura apresenta correlação com a resistência relativa à espessura e com a espessura da corda tendínea primaria humana, não estando relacionada com o comprimento da mesma. Cordoalha Corda Tendinea Valva Mitral Aparelho atrio-ventricular Resistência Alongamento Chordae Tendineae Mitral Valve Left Atrioventricular Apparatus Elongation Stretching Resistance Medicine (General) Flávio Roberto Takeda verfasserin aut Carlos Manuel de Almeida Brandão verfasserin aut Domingo Marcolino Braile verfasserin aut Fabio Biscegli Jatene verfasserin aut Pablo Maria Alberto Pomerantzeff verfasserin aut In Clinics Elsevier España, 2005 61(2006), 5, Seite 395-400 (DE-627)507908244 (DE-600)2222974-7 19805322 nnns volume:61 year:2006 number:5 pages:395-400 https://doi.org/10.1590/S1807-59322006000500005 kostenfrei https://doaj.org/article/72f0ae0c59424417883d0669c6344c88 kostenfrei http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1807-59322006000500005 kostenfrei https://doaj.org/toc/1807-5932 Journal toc kostenfrei https://doaj.org/toc/1980-5322 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2088 GBV_ILN_2106 GBV_ILN_2110 GBV_ILN_2112 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4393 GBV_ILN_4700 AR 61 2006 5 395-400 |
| allfields_unstemmed |
10.1590/S1807-59322006000500005 doi (DE-627)DOAJ028890426 (DE-599)DOAJ72f0ae0c59424417883d0669c6344c88 DE-627 ger DE-627 rakwb eng R5-920 Frederico Lafraia Lobo verfasserin aut Study of the traction resistance of mitral valve chordae tendineae Estudo da resistência à tração das cordas da valva mitral 2006 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier OBJECTIVE: To determinate the extension and the resistance of the primary mitral valve chordae tendineae when submitted to traction. The importance of keeping the integrity of papillary muscle, chordae tendineae, and mitral valve cuspid when the replacement of this valve occurs is clear, but the knowledge of the maximum resistance that a primary tendinea chorda can withstand is not known. METHODS: Eight hearts were dissected, and one hundred and thirty two primary human chordae tendineae were measured (length and thickness) and submitted to traction under controlled conditions so that the absolute resistance, resistance relative to thickness (relative resistance), and elongation could be measured. RESULTS: The correlation between the elongation at the moment of rupture and the thickness was equal to 1.54 + 17.02 x thickness (P = 0.026); and to absolute resistance was equal to 0.95 + 1.42 x resistance (P < 0.001); and to the resistance relative to thickness (relative resistance) was equal to 1.95 + 0.08 x relative resistance (P = 0.009). The correlation between the absolute resistance and the thickness was equal to 0.26 + 14.53 x thickness (P < 0.001). CONCLUSION: The resistance of primary mitral valve chordae tendineae is associated with its thickness and elongation at the moment of rupture, but is not associated with the length. The elongation at the moment of rupture shows a relationship with the resistance relative to thickness (relative resistance) and with the thickness of the primary chordae tendineae, but not with the length of the chordae tendineae.<br<OBJETIVO: Determinar o alongamento e a resistência à tração das cordas tendíneas primárias humanas da valva mitral cardíaca. Sabe-se da importância de se manter a integridade do músculo papilar, corda tendínea e cúspide da valva mitral, quando da substituição desta valva, mas não se tem conhecimento da resistência máxima que uma corda tendínea primaria pode sofrer resistência máxima que uma corda tendínea apresenta. MÉTODO: Foram dissecados 8 corações que permitiram a tração de cento e trinta e duas cordas tendíneas primárias humanas. Foram dissecados 8 corações que permitiram a tração de cento e trinta e duas cordas tendíneas primárias humanas, as quais foram medidas (comprimento e espessura) e submetidas a trações em condições controladas, e assim a resistência absoluta, a resistência relativa a espessura (resistência relativa) e o alongamento puderam ser medidos. RESULTADOS: A correlação entre alongamento no momento da ruptura e espessura foi igual a 1,54 + 17,02*espessura (p=0,026); e à resistência absoluta foi igual a 0,95 + 1,42*resistência (p<0,001); e à resistência relativa à espessura foi igual a 1,95 + 0,08*resistência relativa (p=0,009). A correlação entre resistência absoluta e espessura foi igual a 0,26 + 14,53*espessura (p<0,001). CONCLUSÃO: A resistência da corda tendínea primaria humana da valva mitral está relacionada com sua espessura e com o alongamento no momento da ruptura à tração, não estando relacionada ao seu comprimento; e que o alongamento no momento da ruptura apresenta correlação com a resistência relativa à espessura e com a espessura da corda tendínea primaria humana, não estando relacionada com o comprimento da mesma. Cordoalha Corda Tendinea Valva Mitral Aparelho atrio-ventricular Resistência Alongamento Chordae Tendineae Mitral Valve Left Atrioventricular Apparatus Elongation Stretching Resistance Medicine (General) Flávio Roberto Takeda verfasserin aut Carlos Manuel de Almeida Brandão verfasserin aut Domingo Marcolino Braile verfasserin aut Fabio Biscegli Jatene verfasserin aut Pablo Maria Alberto Pomerantzeff verfasserin aut In Clinics Elsevier España, 2005 61(2006), 5, Seite 395-400 (DE-627)507908244 (DE-600)2222974-7 19805322 nnns volume:61 year:2006 number:5 pages:395-400 https://doi.org/10.1590/S1807-59322006000500005 kostenfrei https://doaj.org/article/72f0ae0c59424417883d0669c6344c88 kostenfrei http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1807-59322006000500005 kostenfrei https://doaj.org/toc/1807-5932 Journal toc kostenfrei https://doaj.org/toc/1980-5322 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2088 GBV_ILN_2106 GBV_ILN_2110 GBV_ILN_2112 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4393 GBV_ILN_4700 AR 61 2006 5 395-400 |
| allfieldsGer |
10.1590/S1807-59322006000500005 doi (DE-627)DOAJ028890426 (DE-599)DOAJ72f0ae0c59424417883d0669c6344c88 DE-627 ger DE-627 rakwb eng R5-920 Frederico Lafraia Lobo verfasserin aut Study of the traction resistance of mitral valve chordae tendineae Estudo da resistência à tração das cordas da valva mitral 2006 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier OBJECTIVE: To determinate the extension and the resistance of the primary mitral valve chordae tendineae when submitted to traction. The importance of keeping the integrity of papillary muscle, chordae tendineae, and mitral valve cuspid when the replacement of this valve occurs is clear, but the knowledge of the maximum resistance that a primary tendinea chorda can withstand is not known. METHODS: Eight hearts were dissected, and one hundred and thirty two primary human chordae tendineae were measured (length and thickness) and submitted to traction under controlled conditions so that the absolute resistance, resistance relative to thickness (relative resistance), and elongation could be measured. RESULTS: The correlation between the elongation at the moment of rupture and the thickness was equal to 1.54 + 17.02 x thickness (P = 0.026); and to absolute resistance was equal to 0.95 + 1.42 x resistance (P < 0.001); and to the resistance relative to thickness (relative resistance) was equal to 1.95 + 0.08 x relative resistance (P = 0.009). The correlation between the absolute resistance and the thickness was equal to 0.26 + 14.53 x thickness (P < 0.001). CONCLUSION: The resistance of primary mitral valve chordae tendineae is associated with its thickness and elongation at the moment of rupture, but is not associated with the length. The elongation at the moment of rupture shows a relationship with the resistance relative to thickness (relative resistance) and with the thickness of the primary chordae tendineae, but not with the length of the chordae tendineae.<br<OBJETIVO: Determinar o alongamento e a resistência à tração das cordas tendíneas primárias humanas da valva mitral cardíaca. Sabe-se da importância de se manter a integridade do músculo papilar, corda tendínea e cúspide da valva mitral, quando da substituição desta valva, mas não se tem conhecimento da resistência máxima que uma corda tendínea primaria pode sofrer resistência máxima que uma corda tendínea apresenta. MÉTODO: Foram dissecados 8 corações que permitiram a tração de cento e trinta e duas cordas tendíneas primárias humanas. Foram dissecados 8 corações que permitiram a tração de cento e trinta e duas cordas tendíneas primárias humanas, as quais foram medidas (comprimento e espessura) e submetidas a trações em condições controladas, e assim a resistência absoluta, a resistência relativa a espessura (resistência relativa) e o alongamento puderam ser medidos. RESULTADOS: A correlação entre alongamento no momento da ruptura e espessura foi igual a 1,54 + 17,02*espessura (p=0,026); e à resistência absoluta foi igual a 0,95 + 1,42*resistência (p<0,001); e à resistência relativa à espessura foi igual a 1,95 + 0,08*resistência relativa (p=0,009). A correlação entre resistência absoluta e espessura foi igual a 0,26 + 14,53*espessura (p<0,001). CONCLUSÃO: A resistência da corda tendínea primaria humana da valva mitral está relacionada com sua espessura e com o alongamento no momento da ruptura à tração, não estando relacionada ao seu comprimento; e que o alongamento no momento da ruptura apresenta correlação com a resistência relativa à espessura e com a espessura da corda tendínea primaria humana, não estando relacionada com o comprimento da mesma. Cordoalha Corda Tendinea Valva Mitral Aparelho atrio-ventricular Resistência Alongamento Chordae Tendineae Mitral Valve Left Atrioventricular Apparatus Elongation Stretching Resistance Medicine (General) Flávio Roberto Takeda verfasserin aut Carlos Manuel de Almeida Brandão verfasserin aut Domingo Marcolino Braile verfasserin aut Fabio Biscegli Jatene verfasserin aut Pablo Maria Alberto Pomerantzeff verfasserin aut In Clinics Elsevier España, 2005 61(2006), 5, Seite 395-400 (DE-627)507908244 (DE-600)2222974-7 19805322 nnns volume:61 year:2006 number:5 pages:395-400 https://doi.org/10.1590/S1807-59322006000500005 kostenfrei https://doaj.org/article/72f0ae0c59424417883d0669c6344c88 kostenfrei http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1807-59322006000500005 kostenfrei https://doaj.org/toc/1807-5932 Journal toc kostenfrei https://doaj.org/toc/1980-5322 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2088 GBV_ILN_2106 GBV_ILN_2110 GBV_ILN_2112 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4393 GBV_ILN_4700 AR 61 2006 5 395-400 |
| allfieldsSound |
10.1590/S1807-59322006000500005 doi (DE-627)DOAJ028890426 (DE-599)DOAJ72f0ae0c59424417883d0669c6344c88 DE-627 ger DE-627 rakwb eng R5-920 Frederico Lafraia Lobo verfasserin aut Study of the traction resistance of mitral valve chordae tendineae Estudo da resistência à tração das cordas da valva mitral 2006 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier OBJECTIVE: To determinate the extension and the resistance of the primary mitral valve chordae tendineae when submitted to traction. The importance of keeping the integrity of papillary muscle, chordae tendineae, and mitral valve cuspid when the replacement of this valve occurs is clear, but the knowledge of the maximum resistance that a primary tendinea chorda can withstand is not known. METHODS: Eight hearts were dissected, and one hundred and thirty two primary human chordae tendineae were measured (length and thickness) and submitted to traction under controlled conditions so that the absolute resistance, resistance relative to thickness (relative resistance), and elongation could be measured. RESULTS: The correlation between the elongation at the moment of rupture and the thickness was equal to 1.54 + 17.02 x thickness (P = 0.026); and to absolute resistance was equal to 0.95 + 1.42 x resistance (P < 0.001); and to the resistance relative to thickness (relative resistance) was equal to 1.95 + 0.08 x relative resistance (P = 0.009). The correlation between the absolute resistance and the thickness was equal to 0.26 + 14.53 x thickness (P < 0.001). CONCLUSION: The resistance of primary mitral valve chordae tendineae is associated with its thickness and elongation at the moment of rupture, but is not associated with the length. The elongation at the moment of rupture shows a relationship with the resistance relative to thickness (relative resistance) and with the thickness of the primary chordae tendineae, but not with the length of the chordae tendineae.<br<OBJETIVO: Determinar o alongamento e a resistência à tração das cordas tendíneas primárias humanas da valva mitral cardíaca. Sabe-se da importância de se manter a integridade do músculo papilar, corda tendínea e cúspide da valva mitral, quando da substituição desta valva, mas não se tem conhecimento da resistência máxima que uma corda tendínea primaria pode sofrer resistência máxima que uma corda tendínea apresenta. MÉTODO: Foram dissecados 8 corações que permitiram a tração de cento e trinta e duas cordas tendíneas primárias humanas. Foram dissecados 8 corações que permitiram a tração de cento e trinta e duas cordas tendíneas primárias humanas, as quais foram medidas (comprimento e espessura) e submetidas a trações em condições controladas, e assim a resistência absoluta, a resistência relativa a espessura (resistência relativa) e o alongamento puderam ser medidos. RESULTADOS: A correlação entre alongamento no momento da ruptura e espessura foi igual a 1,54 + 17,02*espessura (p=0,026); e à resistência absoluta foi igual a 0,95 + 1,42*resistência (p<0,001); e à resistência relativa à espessura foi igual a 1,95 + 0,08*resistência relativa (p=0,009). A correlação entre resistência absoluta e espessura foi igual a 0,26 + 14,53*espessura (p<0,001). CONCLUSÃO: A resistência da corda tendínea primaria humana da valva mitral está relacionada com sua espessura e com o alongamento no momento da ruptura à tração, não estando relacionada ao seu comprimento; e que o alongamento no momento da ruptura apresenta correlação com a resistência relativa à espessura e com a espessura da corda tendínea primaria humana, não estando relacionada com o comprimento da mesma. Cordoalha Corda Tendinea Valva Mitral Aparelho atrio-ventricular Resistência Alongamento Chordae Tendineae Mitral Valve Left Atrioventricular Apparatus Elongation Stretching Resistance Medicine (General) Flávio Roberto Takeda verfasserin aut Carlos Manuel de Almeida Brandão verfasserin aut Domingo Marcolino Braile verfasserin aut Fabio Biscegli Jatene verfasserin aut Pablo Maria Alberto Pomerantzeff verfasserin aut In Clinics Elsevier España, 2005 61(2006), 5, Seite 395-400 (DE-627)507908244 (DE-600)2222974-7 19805322 nnns volume:61 year:2006 number:5 pages:395-400 https://doi.org/10.1590/S1807-59322006000500005 kostenfrei https://doaj.org/article/72f0ae0c59424417883d0669c6344c88 kostenfrei http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1807-59322006000500005 kostenfrei https://doaj.org/toc/1807-5932 Journal toc kostenfrei https://doaj.org/toc/1980-5322 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2088 GBV_ILN_2106 GBV_ILN_2110 GBV_ILN_2112 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4393 GBV_ILN_4700 AR 61 2006 5 395-400 |
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In Clinics 61(2006), 5, Seite 395-400 volume:61 year:2006 number:5 pages:395-400 |
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In Clinics 61(2006), 5, Seite 395-400 volume:61 year:2006 number:5 pages:395-400 |
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Cordoalha Corda Tendinea Valva Mitral Aparelho atrio-ventricular Resistência Alongamento Chordae Tendineae Mitral Valve Left Atrioventricular Apparatus Elongation Stretching Resistance Medicine (General) |
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Frederico Lafraia Lobo @@aut@@ Flávio Roberto Takeda @@aut@@ Carlos Manuel de Almeida Brandão @@aut@@ Domingo Marcolino Braile @@aut@@ Fabio Biscegli Jatene @@aut@@ Pablo Maria Alberto Pomerantzeff @@aut@@ |
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The importance of keeping the integrity of papillary muscle, chordae tendineae, and mitral valve cuspid when the replacement of this valve occurs is clear, but the knowledge of the maximum resistance that a primary tendinea chorda can withstand is not known. METHODS: Eight hearts were dissected, and one hundred and thirty two primary human chordae tendineae were measured (length and thickness) and submitted to traction under controlled conditions so that the absolute resistance, resistance relative to thickness (relative resistance), and elongation could be measured. RESULTS: The correlation between the elongation at the moment of rupture and the thickness was equal to 1.54 + 17.02 x thickness (P = 0.026); and to absolute resistance was equal to 0.95 + 1.42 x resistance (P < 0.001); and to the resistance relative to thickness (relative resistance) was equal to 1.95 + 0.08 x relative resistance (P = 0.009). The correlation between the absolute resistance and the thickness was equal to 0.26 + 14.53 x thickness (P < 0.001). CONCLUSION: The resistance of primary mitral valve chordae tendineae is associated with its thickness and elongation at the moment of rupture, but is not associated with the length. The elongation at the moment of rupture shows a relationship with the resistance relative to thickness (relative resistance) and with the thickness of the primary chordae tendineae, but not with the length of the chordae tendineae.<br<OBJETIVO: Determinar o alongamento e a resistência à tração das cordas tendíneas primárias humanas da valva mitral cardíaca. Sabe-se da importância de se manter a integridade do músculo papilar, corda tendínea e cúspide da valva mitral, quando da substituição desta valva, mas não se tem conhecimento da resistência máxima que uma corda tendínea primaria pode sofrer resistência máxima que uma corda tendínea apresenta. MÉTODO: Foram dissecados 8 corações que permitiram a tração de cento e trinta e duas cordas tendíneas primárias humanas. Foram dissecados 8 corações que permitiram a tração de cento e trinta e duas cordas tendíneas primárias humanas, as quais foram medidas (comprimento e espessura) e submetidas a trações em condições controladas, e assim a resistência absoluta, a resistência relativa a espessura (resistência relativa) e o alongamento puderam ser medidos. RESULTADOS: A correlação entre alongamento no momento da ruptura e espessura foi igual a 1,54 + 17,02*espessura (p=0,026); e à resistência absoluta foi igual a 0,95 + 1,42*resistência (p<0,001); e à resistência relativa à espessura foi igual a 1,95 + 0,08*resistência relativa (p=0,009). A correlação entre resistência absoluta e espessura foi igual a 0,26 + 14,53*espessura (p<0,001). 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R - Medicine |
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Frederico Lafraia Lobo |
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Frederico Lafraia Lobo misc R5-920 misc Cordoalha misc Corda Tendinea misc Valva Mitral misc Aparelho atrio-ventricular misc Resistência misc Alongamento misc Chordae Tendineae misc Mitral Valve misc Left Atrioventricular Apparatus misc Elongation misc Stretching Resistance misc Medicine (General) Study of the traction resistance of mitral valve chordae tendineae Estudo da resistência à tração das cordas da valva mitral |
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R5-920 Study of the traction resistance of mitral valve chordae tendineae Estudo da resistência à tração das cordas da valva mitral Cordoalha Corda Tendinea Valva Mitral Aparelho atrio-ventricular Resistência Alongamento Chordae Tendineae Mitral Valve Left Atrioventricular Apparatus Elongation Stretching Resistance |
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misc R5-920 misc Cordoalha misc Corda Tendinea misc Valva Mitral misc Aparelho atrio-ventricular misc Resistência misc Alongamento misc Chordae Tendineae misc Mitral Valve misc Left Atrioventricular Apparatus misc Elongation misc Stretching Resistance misc Medicine (General) |
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misc R5-920 misc Cordoalha misc Corda Tendinea misc Valva Mitral misc Aparelho atrio-ventricular misc Resistência misc Alongamento misc Chordae Tendineae misc Mitral Valve misc Left Atrioventricular Apparatus misc Elongation misc Stretching Resistance misc Medicine (General) |
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Study of the traction resistance of mitral valve chordae tendineae Estudo da resistência à tração das cordas da valva mitral |
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Study of the traction resistance of mitral valve chordae tendineae Estudo da resistência à tração das cordas da valva mitral |
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Frederico Lafraia Lobo |
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Frederico Lafraia Lobo Flávio Roberto Takeda Carlos Manuel de Almeida Brandão Domingo Marcolino Braile Fabio Biscegli Jatene Pablo Maria Alberto Pomerantzeff |
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study of the traction resistance of mitral valve chordae tendineae estudo da resistência à tração das cordas da valva mitral |
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Study of the traction resistance of mitral valve chordae tendineae Estudo da resistência à tração das cordas da valva mitral |
| abstract |
OBJECTIVE: To determinate the extension and the resistance of the primary mitral valve chordae tendineae when submitted to traction. The importance of keeping the integrity of papillary muscle, chordae tendineae, and mitral valve cuspid when the replacement of this valve occurs is clear, but the knowledge of the maximum resistance that a primary tendinea chorda can withstand is not known. METHODS: Eight hearts were dissected, and one hundred and thirty two primary human chordae tendineae were measured (length and thickness) and submitted to traction under controlled conditions so that the absolute resistance, resistance relative to thickness (relative resistance), and elongation could be measured. RESULTS: The correlation between the elongation at the moment of rupture and the thickness was equal to 1.54 + 17.02 x thickness (P = 0.026); and to absolute resistance was equal to 0.95 + 1.42 x resistance (P < 0.001); and to the resistance relative to thickness (relative resistance) was equal to 1.95 + 0.08 x relative resistance (P = 0.009). The correlation between the absolute resistance and the thickness was equal to 0.26 + 14.53 x thickness (P < 0.001). CONCLUSION: The resistance of primary mitral valve chordae tendineae is associated with its thickness and elongation at the moment of rupture, but is not associated with the length. The elongation at the moment of rupture shows a relationship with the resistance relative to thickness (relative resistance) and with the thickness of the primary chordae tendineae, but not with the length of the chordae tendineae.<br<OBJETIVO: Determinar o alongamento e a resistência à tração das cordas tendíneas primárias humanas da valva mitral cardíaca. Sabe-se da importância de se manter a integridade do músculo papilar, corda tendínea e cúspide da valva mitral, quando da substituição desta valva, mas não se tem conhecimento da resistência máxima que uma corda tendínea primaria pode sofrer resistência máxima que uma corda tendínea apresenta. MÉTODO: Foram dissecados 8 corações que permitiram a tração de cento e trinta e duas cordas tendíneas primárias humanas. Foram dissecados 8 corações que permitiram a tração de cento e trinta e duas cordas tendíneas primárias humanas, as quais foram medidas (comprimento e espessura) e submetidas a trações em condições controladas, e assim a resistência absoluta, a resistência relativa a espessura (resistência relativa) e o alongamento puderam ser medidos. RESULTADOS: A correlação entre alongamento no momento da ruptura e espessura foi igual a 1,54 + 17,02*espessura (p=0,026); e à resistência absoluta foi igual a 0,95 + 1,42*resistência (p<0,001); e à resistência relativa à espessura foi igual a 1,95 + 0,08*resistência relativa (p=0,009). A correlação entre resistência absoluta e espessura foi igual a 0,26 + 14,53*espessura (p<0,001). CONCLUSÃO: A resistência da corda tendínea primaria humana da valva mitral está relacionada com sua espessura e com o alongamento no momento da ruptura à tração, não estando relacionada ao seu comprimento; e que o alongamento no momento da ruptura apresenta correlação com a resistência relativa à espessura e com a espessura da corda tendínea primaria humana, não estando relacionada com o comprimento da mesma. |
| abstractGer |
OBJECTIVE: To determinate the extension and the resistance of the primary mitral valve chordae tendineae when submitted to traction. The importance of keeping the integrity of papillary muscle, chordae tendineae, and mitral valve cuspid when the replacement of this valve occurs is clear, but the knowledge of the maximum resistance that a primary tendinea chorda can withstand is not known. METHODS: Eight hearts were dissected, and one hundred and thirty two primary human chordae tendineae were measured (length and thickness) and submitted to traction under controlled conditions so that the absolute resistance, resistance relative to thickness (relative resistance), and elongation could be measured. RESULTS: The correlation between the elongation at the moment of rupture and the thickness was equal to 1.54 + 17.02 x thickness (P = 0.026); and to absolute resistance was equal to 0.95 + 1.42 x resistance (P < 0.001); and to the resistance relative to thickness (relative resistance) was equal to 1.95 + 0.08 x relative resistance (P = 0.009). The correlation between the absolute resistance and the thickness was equal to 0.26 + 14.53 x thickness (P < 0.001). CONCLUSION: The resistance of primary mitral valve chordae tendineae is associated with its thickness and elongation at the moment of rupture, but is not associated with the length. The elongation at the moment of rupture shows a relationship with the resistance relative to thickness (relative resistance) and with the thickness of the primary chordae tendineae, but not with the length of the chordae tendineae.<br<OBJETIVO: Determinar o alongamento e a resistência à tração das cordas tendíneas primárias humanas da valva mitral cardíaca. Sabe-se da importância de se manter a integridade do músculo papilar, corda tendínea e cúspide da valva mitral, quando da substituição desta valva, mas não se tem conhecimento da resistência máxima que uma corda tendínea primaria pode sofrer resistência máxima que uma corda tendínea apresenta. MÉTODO: Foram dissecados 8 corações que permitiram a tração de cento e trinta e duas cordas tendíneas primárias humanas. Foram dissecados 8 corações que permitiram a tração de cento e trinta e duas cordas tendíneas primárias humanas, as quais foram medidas (comprimento e espessura) e submetidas a trações em condições controladas, e assim a resistência absoluta, a resistência relativa a espessura (resistência relativa) e o alongamento puderam ser medidos. RESULTADOS: A correlação entre alongamento no momento da ruptura e espessura foi igual a 1,54 + 17,02*espessura (p=0,026); e à resistência absoluta foi igual a 0,95 + 1,42*resistência (p<0,001); e à resistência relativa à espessura foi igual a 1,95 + 0,08*resistência relativa (p=0,009). A correlação entre resistência absoluta e espessura foi igual a 0,26 + 14,53*espessura (p<0,001). CONCLUSÃO: A resistência da corda tendínea primaria humana da valva mitral está relacionada com sua espessura e com o alongamento no momento da ruptura à tração, não estando relacionada ao seu comprimento; e que o alongamento no momento da ruptura apresenta correlação com a resistência relativa à espessura e com a espessura da corda tendínea primaria humana, não estando relacionada com o comprimento da mesma. |
| abstract_unstemmed |
OBJECTIVE: To determinate the extension and the resistance of the primary mitral valve chordae tendineae when submitted to traction. The importance of keeping the integrity of papillary muscle, chordae tendineae, and mitral valve cuspid when the replacement of this valve occurs is clear, but the knowledge of the maximum resistance that a primary tendinea chorda can withstand is not known. METHODS: Eight hearts were dissected, and one hundred and thirty two primary human chordae tendineae were measured (length and thickness) and submitted to traction under controlled conditions so that the absolute resistance, resistance relative to thickness (relative resistance), and elongation could be measured. RESULTS: The correlation between the elongation at the moment of rupture and the thickness was equal to 1.54 + 17.02 x thickness (P = 0.026); and to absolute resistance was equal to 0.95 + 1.42 x resistance (P < 0.001); and to the resistance relative to thickness (relative resistance) was equal to 1.95 + 0.08 x relative resistance (P = 0.009). The correlation between the absolute resistance and the thickness was equal to 0.26 + 14.53 x thickness (P < 0.001). CONCLUSION: The resistance of primary mitral valve chordae tendineae is associated with its thickness and elongation at the moment of rupture, but is not associated with the length. The elongation at the moment of rupture shows a relationship with the resistance relative to thickness (relative resistance) and with the thickness of the primary chordae tendineae, but not with the length of the chordae tendineae.<br<OBJETIVO: Determinar o alongamento e a resistência à tração das cordas tendíneas primárias humanas da valva mitral cardíaca. Sabe-se da importância de se manter a integridade do músculo papilar, corda tendínea e cúspide da valva mitral, quando da substituição desta valva, mas não se tem conhecimento da resistência máxima que uma corda tendínea primaria pode sofrer resistência máxima que uma corda tendínea apresenta. MÉTODO: Foram dissecados 8 corações que permitiram a tração de cento e trinta e duas cordas tendíneas primárias humanas. Foram dissecados 8 corações que permitiram a tração de cento e trinta e duas cordas tendíneas primárias humanas, as quais foram medidas (comprimento e espessura) e submetidas a trações em condições controladas, e assim a resistência absoluta, a resistência relativa a espessura (resistência relativa) e o alongamento puderam ser medidos. RESULTADOS: A correlação entre alongamento no momento da ruptura e espessura foi igual a 1,54 + 17,02*espessura (p=0,026); e à resistência absoluta foi igual a 0,95 + 1,42*resistência (p<0,001); e à resistência relativa à espessura foi igual a 1,95 + 0,08*resistência relativa (p=0,009). A correlação entre resistência absoluta e espessura foi igual a 0,26 + 14,53*espessura (p<0,001). CONCLUSÃO: A resistência da corda tendínea primaria humana da valva mitral está relacionada com sua espessura e com o alongamento no momento da ruptura à tração, não estando relacionada ao seu comprimento; e que o alongamento no momento da ruptura apresenta correlação com a resistência relativa à espessura e com a espessura da corda tendínea primaria humana, não estando relacionada com o comprimento da mesma. |
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Study of the traction resistance of mitral valve chordae tendineae Estudo da resistência à tração das cordas da valva mitral |
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https://doi.org/10.1590/S1807-59322006000500005 https://doaj.org/article/72f0ae0c59424417883d0669c6344c88 http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1807-59322006000500005 https://doaj.org/toc/1807-5932 https://doaj.org/toc/1980-5322 |
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Flávio Roberto Takeda Carlos Manuel de Almeida Brandão Domingo Marcolino Braile Fabio Biscegli Jatene Pablo Maria Alberto Pomerantzeff |
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Flávio Roberto Takeda Carlos Manuel de Almeida Brandão Domingo Marcolino Braile Fabio Biscegli Jatene Pablo Maria Alberto Pomerantzeff |
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10.1590/S1807-59322006000500005 |
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| up_date |
2024-07-03T19:58:45.676Z |
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MÉTODO: Foram dissecados 8 corações que permitiram a tração de cento e trinta e duas cordas tendíneas primárias humanas. Foram dissecados 8 corações que permitiram a tração de cento e trinta e duas cordas tendíneas primárias humanas, as quais foram medidas (comprimento e espessura) e submetidas a trações em condições controladas, e assim a resistência absoluta, a resistência relativa a espessura (resistência relativa) e o alongamento puderam ser medidos. RESULTADOS: A correlação entre alongamento no momento da ruptura e espessura foi igual a 1,54 + 17,02*espessura (p=0,026); e à resistência absoluta foi igual a 0,95 + 1,42*resistência (p<0,001); e à resistência relativa à espessura foi igual a 1,95 + 0,08*resistência relativa (p=0,009). A correlação entre resistência absoluta e espessura foi igual a 0,26 + 14,53*espessura (p<0,001). 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| score |
7.397687 |