患者女，50岁。拟行子宫内膜癌根治术。现稍活动即感心慌、气短。既往有27年风湿性心脏病史，曾发生心力衰竭3次。X线胸片、彩色多普勒超声诊断为二尖瓣狭窄并关闭不全，中度肺动脉高压。ECG检查示房颤。患者的ASA分级是（）_胸心外科综合练习_全学科试题题库

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患者女，50岁。拟行子宫内膜癌根治术。现稍活动即感心慌、气短。既往有27年风湿性心脏病史，曾发生心力衰竭3次。X线胸片、彩色多普勒超声诊断为二尖瓣狭窄并关闭不全，中度肺动脉高压。ECG检查示房颤。患者的ASA分级是（）
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