Why so blue?
A 40-year-old man presented to the emergency department with shortness of breath, chest pain and reported a pre-syncopal episode. But why so blue?
Reviewed and revised 14 September 2014 OVERVIEW Methaemoglobinaemia is the state of excessive methaemoglobin in the blood methaemoglobin is an altered state of Hb where ferrous ions (Fe2+) of haem are oxidised to the ferric state (Fe3+) and rendered unable…