Main clinical manifestations were exertional dyspnea, chest pain, cough, hemoptysis, syncope, etc.
临床主要表现有活动性呼吸困难、胸痛、咳嗽、咯血、晕厥等。
Objective: Our aim was to prove that exertional dyspnea is not a limitation for patients with chronic obstructive pulmonary disease (COPD) to exercise.
目的：探讨主观用力呼吸困难不宜作为限制慢性阻塞性肺疾病(COPD)患者运动的标准。
These acute improvements in exertional dyspnea are multifactorial and could not be explained by alterations in ventilatory demand or pulmonary gas exchange.
这种劳力性呼吸困难的短期改善是多因素作用的结果，不能通过通气需求和肺气体交换的改变来解释。
These acute improvements in exertional dyspnea are multifactorial and could not be explained by alterations in ventilatory demand or pulmonary gas exchange.
这种劳力性呼吸困难的短期改善是多因素作用的结果，不能通过通气需求和肺气体交换的改变来解释。
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