Saturday, February, 11, 2012

Cyanosis

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Definition

Raynauds phenomenon is a condition in which cold temperatures or strong emotions cause blood vessel spasms that block blood flow to the fingers, toes, ears, and nose.


Causes, incidence, and risk factors

Raynaud's phenomenon can be associated with other conditions. This is called secondary Raynaud's phenomenon. Most people with the condition are over age 30.

Common causes are:

  • Diseases of the arteries, such as atherosclerosis and buerger's disease
  • Drugs that cause narrowing of arteries,...
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