Lung diffusing capacities for nitric oxide and carbon monoxide at rest and post-walking in long COVID

What is it about?

Previous exercise studies have demonstrated various extra-pulmonary mechanisms as potentially responsible for breathlessness and poor exercise tolerance after COVID-19. This study demonstrates that lung diffusing capacity for nitric oxide is often abnormal at rest in long COVID and remained decreased after low-intensity exercise in about half of subjects despite alveolar and microvascular recruitment being not different from healthy subjects.

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