Balloon occlusion to lessen outflow and further more embolization with ethanol from microcatheter inserted with the balloon catheter. ( This allows baseline indicate and systolic pulmonary arterial strain measurements. Vasodilator therapy, principally milrinone, is administered if pulmonary arterial pressures maximize to greater than 25 mm Hg when compared with baseline values. https://www.sgvascularctr.com/understanding-venous-malformation-treatments-in-singapore/