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。

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Cardiac dyspnea 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。

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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.

结论过度通气综合征除呼吸困难外还常有其他众多症状，但查体都无异常，且常有明显的心因性诱因。

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