Gross and microanatomical studies on the moderator bands (septomarginal trabecula) in the heart of mature Dromedary camel (Camelus dromedarius)

Ghonimi, Wael; Abuel-Atta, Ahmad Awad; Bareedy, Mohamed Hafez; Balah, Ahmad

doi:10.5455/javar.v1i2p24-31

Cited by 12 publications

(25 citation statements)

References 9 publications

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“…Meanwhile, in the cross sections, the cardiac myocytes appear irregular polygonal cells of various sizes with a large, round, pale-staining, euchromatic, centrally placed, single nucleus and also sometimes, binucleated cells. This result is very close and similar to the finding that described after [2,3,27] in camel.…”

Section: Discussionsupporting

confidence: 82%

“…This finding is in coincidence with [2] in camel who described that the moderator bands are fibromuscular structures crossing the ventricular cavity with being attached to the base of the papillary muscles.…”

Section: Discussionmentioning

confidence: 72%

“…Single and branched fibromuscular strand, moderator band was described in the camel right ventricle extending from the interventricular septum to the ventricular free wall at the base of the papillary muscle, passing through the ventricular cavity and appeared fleshy and muscular in its consistency [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

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Moderator Bands (Trabecula septomarginalis) of Mature Buffalo (Bos bubalis L.) with Special Emphasis on the Structure and Distribution of the Purkinje Cardiomyocytes: Histological and Histochemical

Ghonimi¹

2015

Cell Dev Biol

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Ten hearts of mature healthy Buffalo (Bos bubalis L.) were employed to investigate the histological and histochemical structures of the moderator bands. Hearts were gently dissected and the moderator bands were collected. The specimens were processed histologically and subjected to different stains. Grossly, the moderator band (Septomarginal trabeculae) was a single muscular band that was found only in the right ventricle of the buffalo heart. It extended from the interventricular septum to the free ventricular wall especially at the base of the papillary muscle, crossing and passing through the ventricular cavity. Histologically, the moderator band was invested in a dense capsule of connective tissue, endocardium that is mainly consisting of three layers; the endothelial layer of simple squamous epithelium, subendothelial layer of loose connective tissue and the subendocardial layer that connects the endocardium with myocardium. Internally, about 4/5 of the core, myocardium is of the cardiac muscle fibers that arranged in bundles of one direction while only about 1/5 is lodged by purkinje cardiomyocytes that were arranged in bundles distributing mainly in two areas within the moderator band; the subendocardial layer beneath the subendothelial connective tissue and myocardium in between the cardiac myocytes bundles. Centrally, a medium-sized artery of thick wall and a very distinct internal elastic lamina was observed running at the center of the band myocardium and is surrounded with the cardiac myocytes bundles.

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Section: Discussionsupporting

confidence: 82%

Section: Discussionmentioning

confidence: 72%

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Moderator Bands (Trabecula septomarginalis) of Mature Buffalo (Bos bubalis L.) with Special Emphasis on the Structure and Distribution of the Purkinje Cardiomyocytes: Histological and Histochemical

Ghonimi¹

2015

Cell Dev Biol

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“…In the present study, the septomarginal trabeculae of the bovine heart were a single muscular band that extends from the interventricular septum to the opposite right ventricular wall. It is in accordance with findings in studies using others species, such as pigs (Ateş et al, ; Gulyaeva & Roshchevskaya, ), dogs (Bombonato et al, ; Cope, ), camels (Ghonimi, Abuel‐Atta, Bareedy, & Balah, ), equines (Ghonimi et al, ; Halıgür & Dursun, ; Sathyamoorthy & Ramesh, ) and humans (Bandeira et al, ; Kosiński et al, ; Mamatha et al., ; Reig, Alberti, & Petit, ; Rocha et al, ).…”

Section: Discussionsupporting

confidence: 89%

“…Histological studies have revealed more details regarding their functional correlations (Ravishankar, ). In this study, histological examination of the bovine septomarginal trabecula revealed the presence of the connective tissue, cardiac muscular fibres, blood vessels and Purkinje cells, in agreement with the histological aspect of trabecula in other animal species and in humans (Ateş et al, ; Bombonato et al, ; Ghonimi et al, ; Gulyaeva & Roshchevskaya, ; Sathyamoorthy & Ramesh, ).…”

Section: Discussionsupporting

confidence: 87%

Histological and anatomical variations of septomarginal trabecula in bovine hearts

Nascimento

Ruiz

Oliva

2019

Anat Histol Embryol

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The use of hearts from different animals as models in the experimental pharmacology and surgical clinic has led, in recent years, to an increase on interest of research with this organ. The heart’s conducting system, from the septomarginal trabecula, presents several variations, which generates numerous controversies in the literature. So, the objective of the present study is to analyse the morphology of the septomarginal trabecula of bovine hearts, identifying possible macro‐ and microscopic variations. Thirty‐four bovine hearts were analysed. Each trabecula was analysed macroscopically to obtain an anatomical description and measurements of its length and thickness. For histological and morphometric analysis, the samples were fixed in Bouin’s solution and then subjected to histological processing. In all the analysed bovine hearts, the septomarginal trabecula presented itself as a smooth, tubular meaty structure of muscular consistency, with variable length and diameter. The anatomical variations observed included a trabecula with forked marginal fixation, and single septal fixation, in addition to a trabecula with extremely reduced or excessively thick caliber. The septomarginal trabecula consists of cardiac muscle fibres, connective tissue, vascular tissue and conduction myofibrils or Purkinje fibres. In the samples of smaller thicknesses, there was a predominance of connective tissue and scarce cardiac muscle tissue, whereas in the thicker samples the predominance was of cardiac striated muscle tissue. Therefore, there are significant macro‐ and microscopic differences between the bovine septomarginal trabecula concerning their diameter and constituent tissue, and that can lead to possible changes in cardiac physiology.

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Gross anatomy of the heart of the alpaca (Vicugna pacos, Linnaeus 1758)

Pérez

Méndez

Vazquez

et al. 2017

Anat Histol Embryol

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The available information about anatomical characteristics of the cardiovascular system of the alpaca (Vicugna pacos, Linnaeus 1758) is scarce. The general objective of this work was to describe its heart anatomy. We dissected six adult animals and five neonates. The heart of the alpaca was located in the middle mediastinum, with a craniocaudal extension from the third to the sixth rib. No ligament that connected the fibrous pericardium to the sternum or to the diaphragm was detected. In the right atrium, there was a developed crista terminalis and small pectinate muscles. In the right ventricle, the septomarginal trabecula was very large. From the proximities of the interventricular septum arose small septomarginal trabeculae that ended in carnous trabeculae of the septal wall. The left atrium included little developed pectinate muscles. On the left ventricle, both papillary muscles were bilobed. Two left septomarginal trabeculas were detected in this ventricle. The left subclavian artery was originated from the aortic arch separately from the brachiocephalic trunk, and bicarotid trunk was present. The other branches of the subclavian artery were similar to the domestic ruminants. The arterial supply of the heart was of the right type. In conclusion, the heart anatomy of alpaca and the irrigation of thoracic cavity were more similar to those of old world camels and different from domestic ruminants.

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Gross and microanatomical studies on the moderator bands (septomarginal trabecula) in the heart of mature Dromedary camel (Camelus dromedarius)

Cited by 12 publications

References 9 publications

Moderator Bands (Trabecula septomarginalis) of Mature Buffalo (Bos bubalis L.) with Special Emphasis on the Structure and Distribution of the Purkinje Cardiomyocytes: Histological and Histochemical

Moderator Bands (Trabecula septomarginalis) of Mature Buffalo (Bos bubalis L.) with Special Emphasis on the Structure and Distribution of the Purkinje Cardiomyocytes: Histological and Histochemical

Histological and anatomical variations of septomarginal trabecula in bovine hearts

Gross anatomy of the heart of the alpaca (Vicugna pacos, Linnaeus 1758)

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