Cyanotic heart defect

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Cyanotic heart defect is a group-type of congenital heart defects (CHDs) that occurs due to deoxygenated blood bypassing the lungs and entering the systemic circulation or a mixture of oxygenated and unoxygenated blood entering the systemic circulation. It is caused by structural defects of the heart (i.e.:right-to-left, bidirectional shunting, malposition of the great arteries), or any condition which increases pulmonary vascular resistance. The result being the development of collateral circulation.

Signs and symptoms[edit]

  • Clubbing
  • The patient assuming a crouching position
  • Cyanosis - facial discolouration (particularly the lips) and digit discolouration (fingers & toes).
  • Crying
  • Crabbiness/irritability
  • Tachycardia
  • Tachypnea
  • A history of inadequate feeding.
  • Unusually large toe & fingernails.
  • Delayed development (both biological & psychological).


Pharmacological Treatment & Management[edit]

Non Cyanotic Heart Defects[edit]

Non cyanotic heart defects are more common because of higher survival. In these the shunt is initially from left (oxygenated) to right ( non oxygenated). These are


  1. ^ Page Elizabeth D Agabegi; Agabegi, Steven S. (2008). Step-Up to Medicine (Step-Up Series). Hagerstwon, MD: Lippincott Williams & Wilkins. ISBN 0-7817-7153-6.