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Symptoms and Signs – Differential Diagnosis of Breathlessness
Acute {minutes)
Pulmonary embolism
Pneumothorax
Foreign body
Anxiety
Anaphylaxis

Subacute {hours)
Metabolic acidosis
Left ventricular failure (pulmonary oedema)
COPD
Chest infection (bacterial, viral, fungal, TB)
Asthma

Chronic {days-weeks)
Recurrent pulmonary emboli
Pulmonary hypertension
Pulmonary fibrosis (cryptogenic, connective tissue diseases, drugs, environmental/ occupational lung disease)
Neuromuscular disorders, chest wall deformities
Lung cancer
Hepatorenal syndrome
COPD
Cirrhotic hydrothorax
Chest infection, bronchiectasis
Cardiac disease (heart failure, arrhythmias, valvular heart disease)
Asthma
Anaemia
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