Comparative study on the treatment of isolated valvular pulmonary stenosis between percutaneous balloon pulmonary valvuloplasty and surgical valvulotomy

经皮肺动脉瓣球囊成形术与外科治疗 单纯性肺动脉瓣狭窄的对比研究

They are patients in whom the valvulotomy was least adequate .

他们是 那些 最 不 适于 作 瓣膜 切开 术的患者。