Cardiacdyspnea is always worsened by exertion and partly or completely relieved by rest.
劳力可加剧心源性呼吸困难，休息则可部分或完全使之缓解。
2
Dyspnea also results when cardiac output is inadequate for the body's metabolic demands and can occur without pulmonary edema.
当心排血量不能满足身体代谢需要，甚或无肺水肿患者，也可出现呼吸困难。
3
Conclusion Besides dyspnea, hyperventilation syndrome has many other symptoms as well as cardiac inducement, but it has no abnormal findings in physical and CT examination.