Lion of the Right ventricle

Lion of the Right ventricle

Lion of the Right ventricle

[A] Moderator band
[B] Anterior papillary muscle
[C] Infundibulum
[D] Oblique septal fibers

Lion of the Right ventricle

Lion of the Right ventricle – Oblique septal fibers

The septum is the lion of RV function – because the right ventricle must rely upon this intrinsic twisting function of oblique septal fibers to maintain output against increased pulmonary vascular resistance.

Studies show

• RV function is determined by the interaction of its lateral wall and the obliquely orientated fibres of the septum, which he nominates as the ‘Lion of the Right ventricle’,
• MRI studies that indicate RV longitudinal function (upon which RV ejection and filling relies on) is due to the septal twisting and untwisting.

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