Família ABC Arquivos Brasileiros de Cardiologia International Journal of Cardiovascular Sciences ABC Heart Failure & Cardiomyopathy ABC Imagem Cardiovascular
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Família ABC
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Família ABC

  • Família ABC
  • Arquivos Brasileiros de Cardiologia
  • International Journal of Cardiovascular Sciences
  • ABC Heart Failure & Cardiomyopathy
  • ABC Imagem Cardiovascular
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  2. Palavra-chave: morphometry
ABC
Original Article

Myocardial Bridges and their Relationship to the Anterior Interventricular Branch of the Left Coronary Artery

Vanildo Júnior de Melo Lima et al. Jennecy Sales Cavalcanti Tetsuo Tashiro

OBJECTIVE: To analyze the relationship between myocardial bridges and the anterior interventricular branch (anterior descending) of the left coronary artery. METHODS: The study was carried out with postmortem material, and methods of dissection and observation were used. We assessed the perimeter of the anterior interventricular branch of the left coronary artery using a pachymeter, calculated its proximal and distal diameters in relation to the myocardial bridge, and also its diameter under the myocardial bridge in 30 hearts. We also observed the position of the myocardial bridge in relation to the origin of the anterior interventricular branch. RESULTS: The diameters of the anterior interventricular branch were as follows: the mean proximal diameter was 2.76±0.76 mm; the mean diameter under the myocardial bridge was 2.08±0.54 mm; and the mean distal diameter was 1.98±0.59 mm. In 33.33% (10/30) of the cases, the diameter of the anterior interventricular branch under the myocardial bridge was lower than the diameter of the anterior interventricular branch distal to the myocardial bridge. In 3.33% (1/30) of the cases, an atherosclerotic plaque was found in the segment under the myocardial bridge. The myocardial bridge was located in the middle third of the anterior interventricular branch in 86.66% (26/30) of the cases. CONCLUSION: Myocardial bridges are more frequently found in the middle third of the anterior interventricular branch of the left coronary artery. The diameter of the anterior interventricular branch of the left coronary artery under the myocardial bridge may be smaller than after the bridge. Myocardial bridges may not provide protection against the formation of atherosclerotic plaque inside the anterior interventricular branch of the left coronary artery.

  • coronary arteries
  • morphometry
  • myocardial bridge
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Creative Commons Attribution (CC BY) Creative Commons license
09/10/2002 DOI: 10.1590/S0066-782X2002001200002 Visualizações 1
ABC
Original Article

Correlations Between the Collagen Content of the Human Left Ventricular Myocardium, Measured by Biochemical and Morphometric Methods

José Duarte de Morais Lopes et al. Roseli Aparecida da Silva Gomes Valdemar Hial Isabel Cristina Rezende Lopes … Marlene Antônia dos Reis Vicente de Paula Antunes Teixeira

OBJECTIVE: To assess, in myocardium specimens obtained from necropsies, the correlation between the concentration of hydroxyproline, measured with the photocolorimetric method, and the intensity of fibrosis, determined with the morphometric method. METHODS: Left ventricle myocardium samples were obtained from 45 patients who had undergone necropsy, some of them with a variety of cardiopathies and others without any heart disease. The concentrations of hydroxyproline were determined with the photocolorimetric method. In the histologic sections from each heart, the myocardial fibrosis was quantified by using a light microscope with an integrating ocular lens. RESULTS: A median of, respectively, 4.5 and 4.3 mug of hydroxyproline/mg of dry weight was found in fixed and nonfixed left ventricle myocardium fragments. A positive correlation occurred between the hydroxyproline concentrations and the intensity of fibrosis, both in the fixed (Sr=+0.25; p=0.099) and in the nonfixed (Sr=+0.32; p=0.03) specimens. CONCLUSION: The biochemical methodology was proven to be adequate, and manual morphometry was shown to have limitations that may interfere with the statistical significance of correlations for the estimate of fibrosis intensity in the human myocardium.

  • heart
  • hydroxyproline
  • morphometry
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Creative Commons Attribution (CC BY) Creative Commons license
01/08/2002 DOI: 10.1590/S0066-782X2002001000002 Visualizações 3
ABC
Original Article

Comparison between right and left ventricular myocardia during the human fetal period. Stereological evaluation

Ricardo Xavier-Vidal et al. Kalil Madi

PURPOSE: To develop a stereological comparison between right (RV) and left ventricle (LV) myocardium during the third human gestational trimester. METHODS: Five human fetal hearts of the third trimester provided representative samples of 5 RV myocardium and 4 LV myocardium. The material was fixed in 10% buffered formaldehyde, and processed through routine methods. Fifteen microscopic fields were randomly chosen and counted in each ventricular myocardium using an “M-42” test system. The following stereological parameters were assessed: Vv (%), Lv (µm²), Sv (µm²/µm³), Vp (µm³), Nv (1/mm³) and total N. RESULTS: No significant difference between the stereological parameters of the myocardial structures assessed was evidenced, when comparing RV and LV. CONCLUSION: Right and left human ventricular myocardium are very similar during the fetal period at least in regard to their structural aspects.

  • biometry
  • cardiac development
  • fetus
  • morphology
  • morphometry
  • stereology
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Creative Commons Attribution (CC BY) Creative Commons license
27/10/2000 DOI: 10.1590/S0066-782X1999000500005 Visualizações 1

Como citar este artigo

EndNote RIS

Formato de Documento Eletrônico (Vancouver)

Lima VJM, Cavalcanti JS, Tashiro T. Myocardial Bridges and their Relationship to the Anterior Interventricular Branch of the Left Coronary Artery. Arquivos Brasileiros de Cardiologia 2002;79(3):219-22.

Formato de Documento Eletrônico (ABNT)

Lima, Vanildo Júnior de Melo; Cavalcanti, Jennecy Sales; Tashiro, Tetsuo. Myocardial Bridges and their Relationship to the Anterior Interventricular Branch of the Left Coronary Artery. Arquivos Brasileiros de Cardiologia, v. 79, n. 3, p. 219-222, out. 2002.

Formato de Documento Eletrônico (APA)

Lima, V. J. M., Cavalcanti, J. S., & Tashiro, T. (2002). Myocardial Bridges and their Relationship to the Anterior Interventricular Branch of the Left Coronary Artery. Arquivos Brasileiros de Cardiologia, 79(3), 219-222.

Formato de Documento Eletrônico (ISO)

Lima, Vanildo Júnior de Melo and Cavalcanti, Jennecy Sales and Tashiro, Tetsuo. Myocardial Bridges and their Relationship to the Anterior Interventricular Branch of the Left Coronary Artery. Arquivos Brasileiros de Cardiologia [online]. 2002, vol. 79, n. 3, [citado 2026-10-14], pp. 219-222. Disponível em: <https://journals.cardiol.br/article/myocardial-bridges-and-their-relationship-to-the-anterior-interventricular-branch-of-the-left-coronary-artery-2/>. ISSN 0066-782X

EndNote RIS

Formato de Documento Eletrônico (Vancouver)

Lopes JDM, Gomes RAS, Hial V, Lopes ICR, Reis MA, Teixeira VPA. Correlations Between the Collagen Content of the Human Left Ventricular Myocardium, Measured by Biochemical and Morphometric Methods. Arquivos Brasileiros de Cardiologia 2002;79(1):15-9.

Formato de Documento Eletrônico (ABNT)

Lopes, José Duarte de Morais; Gomes, Roseli Aparecida da Silva; Hial, Valdemar; Lopes, Isabel Cristina Rezende; Reis, Marlene Antônia dos; Teixeira, Vicente de Paula Antunes. Correlations Between the Collagen Content of the Human Left Ventricular Myocardium, Measured by Biochemical and Morphometric Methods. Arquivos Brasileiros de Cardiologia, v. 79, n. 1, p. 15-19, jul. 2002.

Formato de Documento Eletrônico (APA)

Lopes, J. D. M., Gomes, R. A. S., Hial, V., Lopes, I. C. R., Reis, M. A. , & Teixeira, V. P. A. (2002). Correlations Between the Collagen Content of the Human Left Ventricular Myocardium, Measured by Biochemical and Morphometric Methods. Arquivos Brasileiros de Cardiologia, 79(1), 15-19.

Formato de Documento Eletrônico (ISO)

Lopes, José Duarte de Morais and Gomes, Roseli Aparecida da Silva and Hial, Valdemar and Lopes, Isabel Cristina Rezende and Reis, Marlene Antônia dos and Teixeira, Vicente de Paula Antunes. Correlations Between the Collagen Content of the Human Left Ventricular Myocardium, Measured by Biochemical and Morphometric Methods. Arquivos Brasileiros de Cardiologia [online]. 2002, vol. 79, n. 1, [citado 2026-10-14], pp. 15-19. Disponível em: <https://journals.cardiol.br/article/correlations-between-the-collagen-content-of-the-human-left-ventricular-myocardium-measured-by-biochemical-and-morphometric-methods-2/>. ISSN 0066-782X

EndNote RIS

Formato de Documento Eletrônico (Vancouver)

Xavier-Vidal R, Madi K. Comparison between right and left ventricular myocardia during the human fetal period. Stereological evaluation. Arquivos Brasileiros de Cardiologia 2000;72(5):587-92.

Formato de Documento Eletrônico (ABNT)

Xavier-Vidal, Ricardo; Madi, Kalil. Comparison between right and left ventricular myocardia during the human fetal period. Stereological evaluation. Arquivos Brasileiros de Cardiologia, v. 72, n. 5, p. 587-592, out. 2000.

Formato de Documento Eletrônico (APA)

Xavier-Vidal, R., & Madi, K. (2000). Comparison between right and left ventricular myocardia during the human fetal period. Stereological evaluation. Arquivos Brasileiros de Cardiologia, 72(5), 587-592.

Formato de Documento Eletrônico (ISO)

Xavier-Vidal, Ricardo and Madi, Kalil. Comparison between right and left ventricular myocardia during the human fetal period. Stereological evaluation. Arquivos Brasileiros de Cardiologia [online]. 2000, vol. 72, n. 5, [citado 2026-10-14], pp. 587-592. Disponível em: <https://journals.cardiol.br/article/comparison-between-right-and-left-ventricular-myocardia-during-the-human-fetal-period-stereological-evaluation-2/>. ISSN 0066-782X

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