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| SPECIALIST ANSWERS
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Question |
How knee chest positioning helps in managing cyanotic spell in TOF? What is the developmental anomaly of heart in TOF?
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Answer |
Children with TOF typically are born with 4 abnormalities of the heart:
Obstruction of the right ventricular outflow tract
Ventricular septal defect-VSD
Enlargement of the right ventricle
Over-riding of the ventricular septum by the aorta
Knee-to-chest position is advised in a cyanotic spell to increase peripheral vascular resistance. This reduces the right-to-left shunting at the VSD, resulting in diminished pulmonary blood flow.
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