Assertion: central cyanosis | /r/HasAspect | many possible causes
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text: Central cyanosis has many possible causes, including:</p><ul><li>breathing and lung problems</li><li>heart defects that allow oxygen-poor blood from the right side of the heart to mix with oxygen-rich blood in the left side of the heart, so the blood that is pumped out to the body is low in oxygen; these defects are known as right-to-left