Unoxygenated Blood Enters the Systemic Circulation in Children with Tetralogy

question 74

Multiple Choice

Unoxygenated blood enters the systemic circulation in children with tetralogy of Fallot because:

• A) the aorta and pulmonary artery have exchanged positions.
• B) pulmonary stenosis changes the ventricular pressures.
• C) the left ventricular wall has hypertrophied.
• D) the septal defect allows exchange of blood between the atria.