title: Anatomy of the septomarginal trabecula in goat hearts.
abstract: Our aim in this study was to examine the right septomarginal trabecula of goats regarding the frequency, origin course of the septal and free component, attachment to the papillaris magnus muscle and size . The material used consisted in 32 hearts from non-pedigree goats of both sexes, preserved in 10% formalin. The right septomarginal trabecula was present in all hearts. It could also present a prominence in the form of a cord in the septum before detaching and going towards the wall or the papillary muscle. We called this a septal component and found it in 69% of all hearts studied. In the remaining specimens, the exit of the septomarginal trabecula was abrupt, without presenting a septal component. It could be attached solely to the papillaris magnus muscle or to the papillary muscle and the ventricle wall, originated in the cranial third of the septum, and was attached to the middle third of the papillary muscle or its caudal third. Its free part, from the septum to the papillaris magnus muscle, ranged in length from 1.3 cm to 2.6 cm. The mean value was 1.7 cm, and the most frequent values were 1.9 and 1.5 cm. In conclusion, in goats, the septomarginal trabecula is a constant and invariable structure.
authors.affiliation: FACIPLAC--Faculdades Integradas da União Educacional do Planalto Central, Gama, Brasilia, DF.
authors.forename: Camila Ribeiro
authors.initials: CR
authors.lastname: Leão
authors.forename: Diego Lago
authors.initials: DL
authors.lastname: Pacha
authors.forename: Thiago
authors.initials: T
authors.lastname: Cyriaco
authors.forename: Cavalcante
authors.initials: C
authors.lastname: da Silva
authors.forename: Nader
authors.initials: N
authors.lastname: Wafae
authors.forename: Heloisa Maria Lemes
authors.initials: HM
authors.lastname: Pereira
authors.forename: Cristiane Regina
authors.initials: CR
authors.lastname: Ruiz
mesh_terms: D000717:Anatomy, Comparative / Q000379:methods; D000818:Animals; D002036:Bundle of His / Q000033:anatomy & histology / Q000502:physiology; D002320:Cardiovascular Physiological Phenomena; D004210:Dissection / Q000379:methods; D005260:Female; D006041:Goats / Q000033:anatomy & histology* / Q000502:physiology; D006321:Heart / Q000033:anatomy & histology* / Q000502:physiology; D006352:Heart Ventricles / Q000033:anatomy & histology*; D008297:Male; D010210:Papillary Muscles / Q000033:anatomy & histology / Q000502:physiology; D013599:Systole / Q000502:physiology; D014261:Tricuspid Valve / Q000033:anatomy & histology / Q000502:physiology; D054088:Ventricular Septum / Q000033:anatomy & histology / Q000502:physiology