36例肺动脉瓣狭窄经皮球囊扩张术前后右室-肺动脉收缩压差的变化
36례폐동맥판협착경피구낭확장술전후우실-폐동맥수축압차적변화
Changes of pressure difference bitween right ventricle and pulmonary artery at pre - and post - saccule dilatation:report of 36 cases
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