Question

What is Tetralogy of Fallot?

a.

A hole from a septum secundum or septum primum defect in the interatrial septum produces a modest left-to-right shunt.

b.

The aorta arises from the right ventricle and the pulmonic trunk from the left ventricle. A VSD, or ASD with PDA, is needed for extrauterine survival. There is right-to-left shunting.

c.

There is a hole within the membranous or muscular portions of the intraventricular septum that produces a left-to-right shunt, more severe with larger defects.

d.

Pulmonic stenosis results in right ventricular hypertrophy and a right-to-left shunt across a VSD, which also has an overriding aorta.

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Answer: (d).Pulmonic stenosis results in right ventricular hypertrophy and a right-to-left shunt across a VSD, which also has an overriding aorta. Explanation:Tetralogy of Fallot is a type of congenital heart disease characterized by four specific heart defects: pulmonic stenosis, right ventricular hypertrophy, a ventricular septal defect (VSD), and an overriding aorta. Pulmonic stenosis is a narrowing of the pulmonary valve and leads to right ventricular hypertrophy. The VSD allows blood to flow from the right ventricle to the left ventricle, which causes blood with low oxygen levels to be pumped into the systemic circulation, leading to cyanosis. The overriding aorta refers to the aorta being shifted to the right, partially overriding the VSD.

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Q. What is Tetralogy of Fallot?
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