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Dyspnea Ddx
Airways diseaseo Upper airway obstruction (foreign body, anaphylaxis, mass)o Asthmao COPDo Mucous plugging
Parenchyma lung diseaseo Pneumoniao ARDSo Interstitual lung disease (fibrosis)
Vascularo PEo Pulmonary HTNo Vasculitis
Pleural diseaseo Pneumothorax, o Pleural effusion
Chest wall deformitieso Scoliosis and kyphosiso Ank spon
Neuromuscularo Polymyosistiso ALSo Phrenic nerve paresiso Guillain barre syndromeo Myasthenia gravis and eaton-lamberts
CVSo CHFo Mitral stenosiso Severe anemia
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