DDx ⬇
- Asthma
- Pulmonary embolism
- Early pneumonia
- Early interstitial lung disease
- Early pneumocystis pneumonia (PCP)
- Shunt, eg, atrial or ventricular septal defect, arteriovenous malformation, atelectasis
- Pulmonary hypertension
- Chronic alveolar hypoventilation
Related DDx ⬆