Abstract: The present invention relates to at least three orifices which are situated at the junction level of the proximal end close to the heart and the distal end of the medical device and on the cuffed distal end, in order to ensure control of a potential thromboembolism risk, after implantation of the medical device which is used for the purpose of palliative treatment and/or treatment without developing pulmonary hypertension in patients of all age groups who have human heart defects, particularly congenital heart defects, secondary increased pulmonary blood flow and pulmonary hypertension risk; and preparing the left ventricular for systemic circulation in case of development of right ventricular failure following atrial “switch” in patients who have transposition of large arteries with a left ventricular being subjected to involution—to the main pulmonary artery.

Abstract: The present invention relates to a medical device (5) which is used for palliative treatment and/or treatment at every stage without developing pulmonary hypertension in patients who have increased pulmonary blood flow and pulmonary hypertension risk that are caused particularly by congenital heart diseases with left to right shunt and functional single ventricular diseases, in heart defects; also, to treat patients who have a congenital heart defect and transposition of large arteries.