Tricuspid regurgitant velocity elevation in a three-year old child with sickle cell anemia and recurrent acute chest syndromes reversed not by hydroxyurea but by bone marrow transplantation

一名患有镰状细胞贫血和反复急性胸痛综合征的三岁儿童，其三尖瓣反流速度升高，但羟基脲治疗无效，而骨髓移植后症状才得以逆转。