Atrial septostomy benefits severe pulmonary hypertension patients by increase of left ventricular preload reserve
American Journal of Physiology - Heart and Circulatory Physiology, 06/26/2012
Koeken Y et al. – AS only improves symptoms of right heart failure in patients with severe PH if net right–to–left shunt flow occurs during exercise. This flow enhances left ventricular filling, allows blood pressure maintenance, but does not increase oxygen availability in the peripheral tissue.