Mariana is a little girl, who is 5 years old, from Costa Rica. When she was born she had a complicated transposition of great vessels in her heart. She had to undergo a cardiac surgery when she was just 17 days years old, if not she would have died. Then when she was 3 years old, a complication occurred. A stenosis from the pulmonary artery and valve happened. Because of this she had another open heart surgery in Spain, due to that in her country Costa Rica, we don´t have the equipment nor expertise to perform it. Now another problem is present. There is a valvular and subvalvular stenosis at the aortic valve. That´s why she need urgently this surgery. The surgery is going to be performed in Barcelona, Spain because of the previous reasons. Dr. Raul Abella, cardiothoracic surgeon is going to do it.Mariana is my daughter, she is so positive with her life. She is very joyful and happy. She even wants to become a doctor so she can help other children. This is why we are makinf efforts to raise $40000 in order to cover the cost of the surgery expenses. Please help us!!!