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​Symptoms and Signs – Differential Diagnosis of Cyanosis 
Cyanosis
Central
Reduced  Oxygen transfer due to lung disease: fibrosing alveolitis, severe pneumonia,
COPD, massive pulmonary embolism
R ---> L shunt (cyanotic congenital heart disease)
Methaemoglobinaemia, sulfhaemoglobinaemia
Acute: asthma, pneumothorax, inhaled foreign body, left ventricular failure

Peripheral
All causes of central cyanosis
Cold exposure
Raynaud's phenomenon
Arterial occlusion
Reduced Cardiac output e.g. shock, left ventricular failure
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Kembara Xtra 

Facts about medicine and its subtopic such as anatomy, physiology, biochemistry, pharmacology, medicine, pediatrics, psychiatry, obstetrics and gynecology and surgery.