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Morphological classification of the septomarginal trabecula in humans

S T F Bandeira1, G C Wafae, C Ruiz

  • 1Universidade Federal de São Paulo e Universidade Federal da Paraiba, São Paulo, Brazil.

Folia Morphologica
|November 26, 2011
PubMed

Insights

Researchers dissected human hearts to create a new classification for the septomarginal trabecula. This anatomical structure was categorized into eight distinct types based on its muscle bundle composition and connections.

Area of Science:

  • Anatomy
  • Cardiovascular Anatomy

Background:

  • The septomarginal trabecula is a recognized cardiac anatomical feature.
  • Existing methods for studying the septomarginal trabecula lack standardization.

Purpose of the Study:

  • To propose a novel classification of the septomarginal trabecula.
  • To detail the anatomical variations of its constituent muscle bundles.

Main Methods:

  • Dissection of 99 adult human cadaveric hearts (72 male, 27 female).
  • Analysis of muscle bundle origin, path, and termination.
  • Evaluation of septal and septal-papillary components.
  • Assessment of papillary-parietal connections.

Main Results:

  • The septomarginal trabecula comprises septal and septal-papillary components.
  • The septal component can be macroscopic or require dissection.
  • The septal-papillary component is always present, varying in order.
  • Papillary-parietal connections can be single or ramified.
  • A classification system identifying eight distinct types of septomarginal trabecula was developed.

Conclusions:

  • A new, detailed classification of the septomarginal trabecula into eight types has been established.
  • This classification is based on objective anatomical criteria derived from dissection.
  • The findings provide a standardized framework for studying this cardiac structure.

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