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      Análise comparativa entre a vascularização ventricular e do nó sinoatrial em gatos Translated title: Comparative analysis between ventricular and sinoatrial node vascularization in cats

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          Abstract

          A possível existência de interdependência na nutrição de territórios atriais e ventriculares tem sido objeto de preocupação por partes dos cardiologistas, especialmente no que tange a vascularização do nó sinoatrial e sua dependência apenas de uma artéria coronária ou de ambas e de sua relação com o predomínio destes vasos na vascularização ventricular. Assim, este estudo objetiva avaliar a relação da irrigação do nó sinoatrial e a origem e a predominância das artérias coronárias na vascularização dos ventrículos, para tanto utilizou-se 30 corações de gatos sem raça definida adultos, machos e fêmeas, sem sinais de afecção cardíaca. Os corações foram injetados pela aorta torácica com Neoprene Latex 450, corados com pigmento vermelho e dissecados posteriormente. Verificou-se que quando ocorria predomínio da vascularização ventricular do tipo esquerda (63,34%) a irrigação do nó sinoatrial ficou predominantemente na dependência do ramo proximal atrial direito (78,9%) ou com menor freqüência pelo ramo proximal atrial esquerdo (21,1%). Na vascularização ventricular do tipo equilibrada (33,34%), a irrigação do sinoatrial ficou na dependência mais freqüentemente do ramo proximal atrial direito (80%), ou com menor freqüência a nutrição do nó se deu pelo ramo proximal atrial esquerdo (20%). Em um caso isolado, ocorreu a vascularização ventricular do tipo direita (3,34%), a nutrição do sinoatrial, ficou na dependência exclusiva do ramo intermédio atrial direito. Estes resultados indicam que nesta espécie não existe relação entre a irrigação do nó sinoatrial e o tipo de vascularização ventricular, independentemente do sexo.

          Translated abstract

          The possible existence of interdependence in the blood nutrition of both atrial and ventricular territories has been a subject of concern to cardiologists, mainly related to vascularization of the sinoatrial node and its dependence on just one coronary artery or both, and its relation with the predominance of these vessels in the ventricular vascularization. Therefore, this research aimed evaluated the relation of blood irrigation of the sinoatrial node in relation to the coronary artery predominance in the ventricle vascularization. In doing so, we analyzed 30 hearts of cats without pedigree, males and females, adults of several ages. They were not carrying any heart problems. The hearts were injected by the thoracic aorta with Neoprene Latex 450, stained with red pigment, and then they were dissected. It was found that when there was a prevalence of ventricular vascularization of the left type (63.34%) the sinoatrial node irrigation was predominantly in the dependency of the Ramus proximalis atrii dextri (78.9%) or with less frequency by Ramus proximalis atrii sinister (21.1%). In the ventricular vascularization of the balanced type (33.34%), the pacemaker irrigation was in dependence more often of Ramus proximalis atrii dextri (80%) or with less frequency the nutrition of the sinoatrial node occurred by Ramus proximalis atril sinister (20%). In a single-case, we observed the ventricular vascularization of the right type (3.34%), the pacemaker nutrition was in an exclusive dependence of the Ramus intermedius atril dextri. These results suggest in this species there is no relationship between both the sinoatrial node irrigation and the type of ventricular vascularization, regardless of gender.

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          Most cited references43

          • Record: found
          • Abstract: not found
          • Article: not found

          Anatomy of the human sinus node.

            Bookmark
            • Record: found
            • Abstract: found
            • Article: not found

            The sinuatrial nodal artery in the human heart.

            U Krupa (1993)
            Studies were performed on 12th hearts taken from cadavers of adults of both sexes. The corrosive technique was used. Arteries were filled with vinyl polychloride or Plastogen G from the side of aortic sinuses. The sino-atrial nodal artery arose as the anterior, intermediate and posterior atrial branches both from the right coronary artery and the left coronary artery. In 51.7% of the hearts the sino-atrial nodal artery formed the arterial circle at the base of the superior vena cava.
              Bookmark
              • Record: found
              • Abstract: found
              • Article: not found

              The sinus node.

              T James (1977)
              This discussion of the sinus node begins with a description of its normal anatomy, particularly in the human heart, and then proceeds to a review of the several pathologic changes known to affect the sinus node. The latter include diseases of the sinus node artery, changes in the normal collagen framework of the node, pericarditis and certain infiltrative processes. The concluding section combines an examination of function and structure of the sinus node on the basis of experimental observations. Some new laws of the heart dealing with governance of normal cardiac rhythm are presented.
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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                pvb
                Pesquisa Veterinária Brasileira
                Pesq. Vet. Bras.
                Colégio Brasileiro de Patologia Animal - CBPA (Rio de Janeiro )
                1678-5150
                January 2012
                : 32
                : 1
                : 78-82
                Affiliations
                [1 ] Universidade de São Paulo Brazil
                [2 ] Universidade Paulista Brazil
                [3 ] Universidade Federal Fluminense Brazil
                [4 ] Universidade de São Paulo Brazil
                Article
                S0100-736X2012000100013
                10.1590/S0100-736X2012000100013
                99e2fb0c-2858-4fe1-9c64-9f618d487a16

                http://creativecommons.org/licenses/by/4.0/

                History
                Product

                SciELO Brazil

                Self URI (journal page): http://www.scielo.br/scielo.php?script=sci_serial&pid=0100-736X&lng=en
                Categories
                VETERINARY SCIENCES

                General veterinary medicine
                Cats,cardiac conduction system,heart vascularization,Felinos,sistema de condução,vascularização cardíaca

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