Dyspnoea

**Definition:** Dyspnoea is used to describe perceptions of difficulty or distress related to breathing and is recognised as symptomatic of disease when it occurs under inappropriate circumstances. Dyspnoea is a presenting complaint of patients with a wide variety of medical diseases by multiple mechanisms. Dyspnoea is considered acute when it lasts from hours up to 3 weeks, subacute from 3 weeks up to 8 weeks, and chronic dyspnoea lasts more than 8 weeks.

**Inclusions:** - Orthopnoea

**Exclusions:** - Transient tachypnoea of newborn