Right Ventricular Structure and Function



- Almost 75 % of the RV systolic function is dependent in longitudinal free RV wall motion. 

- Proper IVS position and contractile function are crucial for the RV function 

- The IVS function and curvature are modified in response to any RV overload. 

- Septomarginal and moderator bands plays crucial role in short axis RV inward function 

- Twisting and rotational movements do NOT contribute significantly to RV ejection in 

compare to the LV 

- The RV contraction is sequential and peristaltic: Inlet toward the trabecular RV free wall and end up with RV infundibulum. 

- TAPSE is reflect the RV and RA longitudinal function. Having normal TAPSE doesn't mean normal RV 

- RV surface to volume ratio is high, therefore, a smaller free wall inward motion is required to eject the same amount of the LV stroke volume 

- The epicardial layer is mainly made by circumferential muscle and the endocardial is mainly longitudinal muscle 



Fawaz Alenezi, MD @fawazalenezi55



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