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Doctoral Thesis
DOI
10.11606/T.10.2012.tde-24092012-152524
Document
Author
Full name
Caio Biasi Mauro
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2012
Supervisor
Committee
Borelli, Vicente (President)
Lima, Ana Rita de
Machado, Marcello
Pereira, Joao Gilberto Lopes
Prada, Irvenia Luiza de Santis
Title in Portuguese
Aspectos comparativos entre os tipos de vascularização ventricular e do nó sinoatrial em corações de cães
Keywords in Portuguese
Caninos
Sistema de condução
Vascularização cardíaca
Abstract in Portuguese
Utilizamos nesta pesquisa 40 corações de cães adultos, 17 machos e 23 fêmeas, de idades variadas, que não portavam macroscopicamente nenhuma afecção cardíaca. Os corações tiveram as artérias coronárias injetadas, separadamente, com Neoprene Látex 450, corado com pigmento vermelho, e posteriormente dissecados. Em todas estas preparações verificamos que na vascularização dos ventrículos predominava a artéria coronária esquerda que fornecia os ramos interventriculares paraconal e subsinuoso. Já, a região ocupada pelo nó sinoatrial ficava mais frequentemente (17 vezes 42,5%) na dependência do ramo proximal atrial esquerdo ou de colateral deste vaso, oriundo do ramo circunflexo esquerdo, ou deste vaso associado ao ramo distal atrial direito (8 vezes 20%), procedente do ramo circunflexo direito. Com menor frequência (14 vezes 30%), a área tomada pelo nó sinoatrial, encontramos apenas colaterais do ramo circunflexo direito, mais exatamente somente o ramo distal atrial direito (10 vezes 25%), apenas o ramo proximal atrial direito (3 vezes 7,5%) ou ainda exclusivamente o ramo intermédio atrial direito (1 vez 2,5%). Em um único caso (1 vez 2,5%) no território do nó sinoatrial observamos apenas colateral do ramo circunflexo esquerdo, isto é o ramo distal atrial esquerdo. A análise destes resultados permite concluir, que nesta espécie não existe qualquer tipo de relação entre o tipo de vascularização dos ventrículos e a irrigação do nó sinoatrial.
Title in English
Comparative apects among the vascularization types of both ventricular and sinoatrial node in dogs
Keywords in English
Canine
Cardiac vascularization
System of conduction
Abstract in English
In this research we analyzed 40 hearts of adult dogs, males and females with different ages, which had no cardiac disease. The hearts had the coronary arteries inject using Neoprene Latex 450, stained by red pigment and then were dissected. In the ventricular vascularization the left coronary artery was predominant and it gave rise to the branches paraconal interventricular and subsinuous. The region occupied by the sinoatrial node was most frequently (17 times 42.5%) in the dependence of the left atrial proximal branch or in the collateral of that vessel, coming from the left circumflex branch, or this vessel associated to the right atrial distal branch (8 times 20%). With less frequency (14 times 30%), in the area occupied by the sinoatrial node, we found only the collaterals of the right circumflex branch, rather only the right atrial distal branch (10 times 25%), only the right atrial proximal branch (3 times 7.5%) or exclusively through the right atrial intermediary branch (1 time 2.5%). In just one case (Once 2.5%) in the area of the sinoatrial node we observed only the collateral of the left circumflex branch, i.e. the left atrial distal branch. According to our results we concluded that in this specie there are no relation between the type of vascularization of the ventricles and the irrigation of the sinoatrial node.
 
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CAIO_BIASI_MAURO.pdf (3.13 Mbytes)
Publishing Date
2014-09-04
 
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