Cause of central cyanosis include all the following except
CHF is a cause for peripheral cyanosis and not central cyanosis. Cyanosis when present in asthma,pulmonic stenosis and alveolar hypoventilation is of central type. Ref Harrison 19th edition pg 249
Chronic asthma
Congestive pulmonary stenosis
Congestive hea failure
Alveolar hypotension
Respiratory system