general clinical features
Last reviewed 01/2018
Symptoms:
- intermittent wheezing, coughing and breathlessness
- trigger factors
- symptoms usually follow a diurnal pattern; a nocturnal cough may be the only symptom
- the patient may complain of a morning tightness and wheezing that occurs usually within seconds of wakening and may take minutes or hours to resolve.
- characteristically asthmatics suffer early morning attacks - morning dips. These may occur in the early hours, e.g. 3 or 4 am, and the patient may wake with tightness, cough and wheezing. These attacks may be confused with paroxysmal nocturnal dyspnoea due to left ventricular failure. The symptom of nocturnal chest tightness is a diagnostic pointer to asthma.
Between attacks:
- may be no signs
- may be signs of chronic asthma like Harrison's sulcus
- may be features of Churg-Strauss syndrome, i.e. nasal polyps and skin rashes
During an attack:
- decreased peak flow
- tachypnoea
- use of accessory muscles of respiration
- hyperinflation, barrel chest
- prolonged expiration
- on auscultation there are a widespread polyphonic, high pitched wheezes