MORPHOLOGICAL AND MORHOMETRIC STUDY OF SEPTOMARGINAL TRABECULAE (MODERATOR BAND)

BACKGROUND AND OBJECTIVES:

Septomariginal trabeculae or Moderator band is a specialized idge connecting interventricular septum to the base of the anterior papillary muscle. It contains Right Bundle anch of HIS, it is also Known to prevent the over distension of the rightventricle. The literature review shows the paucity of articles related to morphological and morphometric evaluation.

Since it has a great clinical importance its, further studies become Mandatory. Here we have measured the Length, the thickness, the Height from the tricuspid orifice, the angle of the Moderator band to its origin from theinterventricular septum and the anterior papillary muscle is measured. The superficial marking of Moderator band on the sternocostal surface of the right ventricle is marked. The morphological variations are noted. The results are compared with gender, with the previous results.

METHODS:

50 Formalin soaked cadaveric Hearts were taken from the department of Anatomy of KSHEMA. 36 Males and 14 Female Hearts were tagged according to ascending order of the age. Moderator band length, thickness, height, the angle with the anterior papillary Muscle ect are Noted.

RESULT:

The average Length of the moderator band is found to be 15.06 mm.

The average thickness of the Moderator band is found to be 4.70 mm.

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The average Height of the Moderator band is found to be 23.64 mm

The average angle between the anterior papillary muscle and moderator band is found to be 91⁰

The average angle between the interventricular septum to the moderator band is found to be 55⁰.

The average Length of the junction of the anterior papillary muscle and moderator band to the right border is found to be 3.13 cm on the sternocostal surface.

The average Length of the junction of the anterior papillary muscle and moderator band to the apex of the Heart is found to be 5.06 cm on the sternocostal surface.

The average Length of the junction of the interventricular septum and moderator band to the right border is found to be 4.71 cm

The average Length of the junction of the interventricular septum and moderator band to the apex of Heart is found to be 5.40 cm.

The average Length of Moderator Band on the sternocostal surface is found to be 17.00 mm, directed to the right and downwards, occupying the centre portion on the sternocostal surface of the right ventricle.

CONCLUSION:

There is a difference in upper border and lower border length as well difference in thickness measured in septal, papillary and at the midpoint of the moderator band, both in male and in females. The height measured from the

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