目的探讨左房压力-容量环在急性心肌缺血时的变化，了解左房功能的改变。
Objective To assess the change of left atrial pressure volume loop and left atrial function in the state of ischemia.
结论正常人中老年组较青年组左房扩大，心房内压力和储存功能增加，心房内血流速度及被动排空功能下降。
Conclusions in normal people, with the increase of age, left atrium size, pressure and reserve function increase, and the passive empty function is reduced in aged people.
结论正常人中老年组较青年组左房扩大，心房内压力和储存功能增加，心房内血流速度及被动排空功能下降。
Conclusions in normal people, with the increase of age, left atrium size, pressure and reserve function increase, and the passive empty function is reduced in aged people.
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