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患者男,52岁,57kg。1年前无明显原因感劳累后心悸、气短,因近一个半月症状明显加重,咳嗽、咳白色泡沫痰,不能平卧人院。体检:T37.5℃,RR20次/分,Pll8次/分,BP95/60mmHg.颈静脉怒张,听诊两中下肺野可闻及湿哕音,心律不齐,心前区舒张期杂音及剑突下收缩期杂音,肝右肋下4cm,双下肢凹陷性水肿。经检查心电图示异位心律,心室率144次/分,心房纤颤;胸部X平片:双肺淤血,肺动脉主干扩张,左房右室增大;超声心动图示:二尖瓣增厚、钙化,交界部粘连,开放明显受限,关闭时少量反流。瓣口面积0.8cm2,三尖瓣回声偏强,开放正常关闭欠佳。心导管检查示右房压17mmHg,肺动脉压63mmHg,肺毛细血管楔压23mmHg,心输出量2.2升/分;血气分析pH7.25,PC0235mmHg,P0278mmHg,BE-7.5。提示:患者轻微活动后感心慌、气喘加重,呼吸困难,不能登二楼。关于该患者的病情评估是()
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