Lion of the Right ventricle


Lion of the Right ventricle


Lion of the Right ventricle

[A] Infundibulum
[B] Lateral wall
[C] Septum
[D] Moderator band



Lion of the Right ventricle


  • Obliquely orientated fibres of the septum – called ‘Lion of the Right ventricle’
  • RV function is determined by the interaction of its lateral wall and the obliquely orientated fibres of the septum
  • MRI studies confirm that the primary events involving septal muscle are chamber shortening and lengthening caused by twisting and thickening that produce ejection, and untwisting and lengthening for suction filling.
  • RV ejection and filling mostly depends on – RV longitudinal function which is due to the septal twisting and untwisting.
  • Right ventricle must rely upon this intrinsic twisting function of oblique septal fibers to maintain output


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