目的指导心脏双瓣膜置换术患者进行呼吸运动训练，预防肺部并发症。
AIM: to instruct the respiratory exercise in patients with heart double valve replacement, so as to prevent the occurrence of pulmonary complications.
目的指导心脏双瓣膜置换术患者进行呼吸运动训练，预防肺部并发症。
AIM: to instruct the respiratory exercise in patients with heart double valve replacement, so as to prevent the occurrence of pulmonary complications.
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