单选题
风湿性心脏病主动脉瓣关闭不全的主要表现是（ ）
发布日期：2020-08-20
左心房、右心室增大
左心室增大
右心室肥大
左心房、右心室增大
右心房增大
试题解析
主动脉瓣关闭不全
主动脉瓣位于左心室和主动脉的连接处，当左心室收缩时，主动脉瓣开放，血液经过主动脉瓣流入主动脉。当左心室舒张时，主动脉瓣关闭，这时主动脉的压力高于左心室的压力。由于密闭的血管和血管的弹性产生舒张压，主动脉瓣关闭之后，心室进入舒张期，此时血液经过冠状动脉灌注心脏。主动脉瓣关闭不全时，左心室收缩期向主动脉排血，舒张期血液倒流入左心室。根据主动脉瓣关闭不全的严重程度，倒流的血量占左心室排出血量的10%～60%甚至更多。
- 外文名
- aortic valve insufficiency
- 多发群体
- 男性
- 常见病因
- 主动脉瓣和（或）主动脉根部疾病所致
- 传染性
- 无
- 就诊科室
- 心内科、心外科
- 常见发病部位
- 主动脉瓣
- 常见症状
- 心悸、气短、呼吸困难、胸痛、晕厥、易疲乏
风湿性心脏病
风湿性心脏病简称风心病，是指由于风湿热活动，累及心脏瓣膜而造成的心脏瓣膜病变。表现为二尖瓣、三尖瓣、主动脉瓣中有一个或几个瓣膜狭窄和（或）关闭不全。临床上狭窄或关闭不全常同时存在，但常以一种为主。患病初期常常无明显症状，后期则表现为心慌气短、乏力、咳嗽、下肢水肿、咳粉红色泡沫痰等心功能失代偿的表现。
- 别名
- 风心病
- 就诊科室
- 心内科
- 常见病因
- 甲组乙型溶血性链球菌感染引起的变态反应
- 传染性
- 无
- 外文名
- rheumatic heart disease
- 常见发病部位
- 心脏
- 常见症状
- 心慌气短、乏力、咳嗽、水肿、粉红色泡沫痰
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