Anatomy of the septomarginal trabecula in Landrace pig hearts

Rocha, Hortênsia Coutinho da; Eliziário, L.F.E.; Wafae, Gabriela Cavallini; Silva, N.C.; Ruiz, Cristiane Regina; Wafae, Nader

doi:10.1016/j.morpho.2010.03.004

Cited by 11 publications

(8 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…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%

“…Studies on the location of moderator bands and the distribution of conductive cells in those structures have been conducted in humans (Bandeira et al, ; Chaudhary, Bharti, & Deshpande, ; Kosiński et al, ; Mamatha, Shenoy, D´Souza, Prasana, Sumalatha, Shenoy, D´Souza, Prasanna, & Sumalatha, ; Rocha et al, ; Shenoy, Lucas, Vinay, & Ramos, ) and several animal species, including goats (Leão et al, ), sheeps (Ansari, Ho, & Anderson, ), pigs (Bojsen‐Moller & Tranum‐Jensen, ; Gulyaeva & Roshchevskaya, ), dogs (Bombonato et al, ), equines (Bombonato et al, ; Sathyamoorthy & Ramesh, ), buffalos (Ghonimi et al, ) and ostriches (Parto, Tadjalli, & Ghazi, ). Meanwhile, not many studies involving morphology, tissue morphological composition and possible variations of the septomarginal trabecula were performed.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Histological and anatomical variations of septomarginal trabecula in bovine hearts

Nascimento

Ruiz

Oliva

2019

Anat Histol Embryol

View full text Add to dashboard Cite

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.

show abstract

Section: Discussionsupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Histological and anatomical variations of septomarginal trabecula in bovine hearts

Nascimento

Ruiz

Oliva

2019

Anat Histol Embryol

View full text Add to dashboard Cite

show abstract

“…In other works, Lorenz and Hunigen [4], Lorenz [5], Lorenz and Guski [6], Crick et al [7] and Rocha et al [8] have shown that the muscle bundle in the septomarginal trabecula of pig hearts is generally a resistant crest that goes from the lower part of the septum to the lower part of the anterior papillary muscle.…”

Section: Introductionmentioning

confidence: 99%

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

View full text Add to dashboard Cite

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.

show abstract

“…The right bundle branch is a narrow band that extends from the upper part of the interventricular septum to the upper part of the anterior papillary muscle. The muscle bundle of the trabecula is a resistant crest that stretches between the lower parts of the same septum and muscle [18]. Electron microscopy of porcine hearts has revealed that the myofibrils in Purkinje fibers (P-fibers) from the septal walls have a cart-wheel arrangement, whereas those in P-fibers of the SMT show a parallel alignment.…”

Section: Morphological and Structural Aspects Of The Septomarginal Trabeculamentioning

confidence: 99%

Comparative Anatomy of the Cardiac Septomarginal Trabecula (Moderator Band)

Haroun¹

2017

APBIJ

View full text Add to dashboard Cite

The septomarginal trabecula (SMT) is a constant component of human heart. In man, it connects the interventricular septum with the anterior wall of the right ventricle at the base of the anterior papillary muscle. It is also present in non-human mammals where it stretches between the bases of the muscles papilaris subarteriosus and magnus. Its morphology and structure varies in different species. It carries the continuation of the right bundle branch of the conducting system of the heart. It is constituted of ordinary cardiac myocytes around and in between the Purkinje myocytes. In addition, it conveys one of the large interventricular septal arteries.

show abstract

Anatomy of the septomarginal trabecula in Landrace pig hearts

Cited by 11 publications

References 11 publications

Histological and anatomical variations of septomarginal trabecula in bovine hearts

Histological and anatomical variations of septomarginal trabecula in bovine hearts

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

Comparative Anatomy of the Cardiac Septomarginal Trabecula (Moderator Band)

Contact Info

Product

Resources

About