Navegando por Palavras-chave "Coronary circulation"

Agora exibindo 1 - 2 de 2
  • Imagem de Miniatura
    Item
    Acesso aberto (Open Access)
    Importância da anatomia da circulação coronária atrial na operação de Cox para controle da fibrilação atrial
    (Sociedade Brasileira de Cirurgia Cardiovascular, 1999-01-01) Jatene, Marcelo B.; Hervoso, Cristina M. [UNIFESP]; Terra, Ricardo M.; Guimarães, Maria Helena; Monteiro, Rosangela; Jatene, Fabio Biscegli; Jatene, Adib D.; Universidade deUniversidade deUniversidade de; Universidade Federal de São Paulo (UNIFESP); Universidade de São Paulo (USP)
    Since the appearance of new surgical techniques such as Cox surgery employed for the treatment of cardiac arrhythmia, especially for atrial fibrillation, the knowledge of coronary artery characteristics and courses has been of increasing importance. The aim of this study was the analysis of this circulation and definition of atrial irrigation patterns. Hence, the coronary arteries of 30 normal human hearts were injected with colored resin and carefully dissected. After macroscopic evaluation of the hearts, no atrial irrigation patterns were found. However, when only the sinus atrial node was analyzed, it showed origin patterns as well as course patterns. Seven origin and route patterns of this artery are described, considering the anatomical structure of the atria as reference points. The described patterns, differently from others found in the literature, are easy to understand and apply in surgical techniques which deal with the atria.
  • Imagem de Miniatura
    Item
    Acesso aberto (Open Access)
    Relação anatômica entre a porção posterior do ânulo mitral e as artérias coronárias: implicações no tratamento cirúrgico
    (Sociedade Brasileira de Cirurgia Cardiovascular, 2004-12-01) Pessa, Clodualdo J. N. [UNIFESP]; Gomes, Walter José [UNIFESP]; Catani, Roberto [UNIFESP]; Prates, José Carlos [UNIFESP]; Buffolo, Enio [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)
    OBJECTIVE: This work aimed to analyze the anatomical relationship among the mitral annulus, the circumflex artery and the posterior left ventricular artery, correlating the distance among the structures mentioned to the pattern of coronary network dominance. METHOD: Eighty-five human hearts, previously preserved in 10% formaldehyde solution, were studied. The coronary network dominance pattern was initially evaluated. Next, atriotomy and left ventriculotomy in the posterior wall of the heart were performed, starting from the lung veins toward the heart apex through the mitral annulus. The atrial wall was removed at the level of the annulus, all around the posterior annulus. Onto the annulus, five points were demarcated: 1 - anterior commissure, 2 - between the anterior commissure and the half-point of the posterior annulus, 3 -half- point of the posterior annulus, 4 - between the half-point of the posterior annulus and the posterior commissure, 5 - posterior commissure. In these points the distance was measured among the structures with an electronic calliper. RESULTS: Right dominance was observed in 81.17% of the cases, balanced dominance in 16.47% and left dominance in 2.35%. Right dominance hearts showed that the area of lower distance between the annulus and the coronary arteries was the anterior commissure, where the circumflex artery was distant to the annulus 3.996 ± 1.865mm while the area of greater distance was the posterior comissure, measuring 7.783 ± 2.615mm. CONCLUSION: This study provided better understanding of the anatomical relationship between the mitral valve and the adjacent coronary arteries, therefore helping cardiac surgeons to prevent operative complications.