Tetralogy of Fallot

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A congenital heart defect where there is a series of four symptoms: pulmonary stenosis, ventricular septal defect, dextroposition of the aorta (causing the aortic opening to override the septum and receive blood from both ventricles), and hypertrophy of right ventricle.


This condition is commonly observed in a blue baby at birth because of lack of sufficient oxygenation. This is treated by surgical means.

Also called: Fallot's tetrad