What is the primary function of V-AV ECMO in treating north-south syndrome?

V-AV ECMO primarily functions to enhance venous drainage and return, particularly in the context of treating north-south syndrome. In north-south syndrome, there is an imbalanced distribution of blood flow between the upper and lower parts of the body, which can lead to significant hypoperfusion in the lower body regions. V-AV ECMO addresses this by effectively facilitating venous drainage from the systemic circulation to improve the return of blood to the heart.

By optimizing venous drainage, V-AV ECMO helps in redirecting the blood flow in a way that can better equalize perfusion and improve overall hemodynamic stability. This is crucial for patients experiencing the disparities characteristic of north-south syndrome, allowing for improved organ function and tissue oxygenation in areas that may be underserved due to this perfusion imbalance.

Other options, though related to ECMO functionalities, do not address the specific requirements of managing north-south syndrome in the same manner. For instance, providing dialysis support is a different function entirely, primarily focused on renal replacement therapy rather than managing the systemic flow issues. Minimizing arterial resistance pertains more to the management of pressures and flows rather than directly addressing the venous drainage enhancements needed in this syndrome. Increasing total body oxygenation