目的以心输出量和肺换气功能为指标研究低潮气量通气对瓣膜置换病人心肺功能的影响。
Objective To investigate the effects of low tidal volume ventilation on pulmonary and cardiac function before and after mitral valve replacement.
术后2周肺通气和换气功能明显好转、症状缓解，至少持续6月。
After 2 weeks the function of pulmonary ventilation was markedly improved, symptoms were alleviated obviously and last for at least 6 months.
术后2周肺通气和换气功能明显好转、症状缓解，至少持续6月。
After 2 weeks the function of pulmonary ventilation was markedly improved, symptoms were alleviated obviously and last for at least 6 months.
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