A Study of the Morphology of the Conducting Tissue in Mammalian Hearts

Nandy, Kalidas; Bourne, Geoffrey H.

doi:10.1159/000142410

Cited by 21 publications

(3 citation statements)

References 2 publications

(2 reference statements)

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“…Nandy and Bourne [1963] reported that the atrioventricular bundle and its branches are less histologically differentiated from the surrounding myocardium in the heart of cat. In contrast with the above observations of Nandy and B ourne ] 1963]. the findings of the present investigation show that in cat the atrioventricular bundle with its branches is readily differentiated from the sur rounding myocardium.…”

Section: Discussioncontrasting

confidence: 99%

Anatomy and histology of the specialized tissues of the heart of the domestic cat (<i>Felis catus</i>)

Qayyum¹

1972

Cells Tissues Organs

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Section: Discussioncontrasting

confidence: 99%

Anatomy and histology of the specialized tissues of the heart of the domestic cat (<i>Felis catus</i>)

Qayyum¹

1972

Cells Tissues Organs

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“…3 A characteristic of the pig heart is fully differentiated and large Purkinje fibers (Figure 3.1) that can be found both subendocardially and intramurally within the heart. 24,25 Similar to humans, the porcine aorta also has vasa vasorum.…”

Section: Chapter 3 Cardiovascular Systemmentioning

confidence: 99%

International Harmonization of Nomenclature and Diagnostic Criteria (INHAND): Nonproliferative and Proliferative Lesions of the Minipig

et al. 2021

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The INHAND (International Harmonization of Nomenclature and Diagnostic Criteria for Lesions) Project ( www.toxpath.org/inhand.asp ) is a joint initiative of the Societies of Toxicologic Pathology from Europe (ESTP), Great Britain (BSTP), Japan (JSTP), and North America (STP) to develop an internationally accepted nomenclature for proliferative and nonproliferative lesions in laboratory animals. The purpose of this publication is to provide a standardized nomenclature for classifying microscopic lesions observed in most tissues and organs from the minipig used in nonclinical safety studies. Some of the lesions are illustrated by color photomicrographs. The standardized nomenclature presented in this document is also available electronically on the internet ( http://www.goreni.org/ ). Sources of material included histopathology databases from government, academia, and industrial laboratories throughout the world. Content includes spontaneous lesions as well as lesions induced by exposure to test materials. Relevant infectious and parasitic lesions are included as well. A widely accepted and utilized international harmonization of nomenclature for lesions in laboratory animals will provide a common language among regulatory and scientific research organizations in different countries and increase and enrich international exchanges of information among toxicologists and pathologists.

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“…While the anatomy of human conduction tissue is the most studied, information concerning animal conduction tissues is also significant and most of knowledge of the eletrophysiology, enervation, histochemistry and ultraestruture of conduction tissue comes from of these species. In this context, it must be emphasized that each species has it own disposition of conduction tissues, so that results obtained in one animal species are not necessarily applicable or reproducible in another species 4 .…”

Section: Introductionmentioning

confidence: 99%

Morfologia da junção atrioventricular em Iguana iguana (Reptilia-Iguanidae)

Jurado

Franco

Morceli

2006

Braz. J. Vet. Res. Anim. Sci.

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A área da junção atrioventricular (AJAV), incluindo nó e feixe atrioventriculares foi investigada em sete corações de iguana comum ou verde (Iguana iguana), usando microscopia de luz. Animais adultos, de ambos os sexos, foram capturados no Pantanal, Brasil. Todos os corações foram fixados em formaldeído tamponado 10% (pH 7,2) por 24 horas, incluídos em parapast de acordo com métodos de rotina e seccionados com 5µm de espessura. Na iguana, a AJAV consiste de uma massa de fibras musculares mergulhada em uma quantidade variável de tecido conjuntivo e vasos sangüíneos, rodeada por miocárdio adjacente e aderida à valva atrioventricular direita no esqueleto fibroso. Através da microscopia de luz, células de condução do nó e feixe atrioventriculares podem ser distinguidas das células de trabalho por serem menores, de coloração pálida e pela presença de um envoltório de tecido conjuntivo. O nó AV bem como o feixe AV e seus ramos formam um trato contínuo. Histologicamente, encontramos fibras elásticas entre as células de condução, principalmente no nó AV. O método do PAS revelou a presença de glicogênio nas células especializadas. O esqueleto fibroso, principalmente, o trígono direito, apresentou um tecido condróide bem desenvolvido, constituído de cartilagem semelhante à hialina (condrócitos binucleados inseridos em grandes lacunas e matriz extracelular com colágeno fibrilar). O esqueleto fibroso tem fibras colágenas e cartilagem semelhante à hialina. Em conclusão, as células nodais e de Purkinje no coração de iguana apresentam pouca diferença morfológica quando comparadas às de mamíferos e aves, contudo o esqueleto fibroso tem um tipo diferente de cartilagem.

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A Study of the Morphology of the Conducting Tissue in Mammalian Hearts

Cited by 21 publications

References 2 publications

Anatomy and histology of the specialized tissues of the heart of the domestic cat (<i>Felis catus</i>)

Anatomy and histology of the specialized tissues of the heart of the domestic cat (<i>Felis catus</i>)

International Harmonization of Nomenclature and Diagnostic Criteria (INHAND): Nonproliferative and Proliferative Lesions of the Minipig

Morfologia da junção atrioventricular em Iguana iguana (Reptilia-Iguanidae)

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