Assessment of Tetralogy of Fallot: Video, Anatomy & Definition | Osmosis

Question

A 3-year-old boy is brought to the clinic by his mother because she is concerned that he is having frequent episodes of breathing difficulty. His mother reports that these episodes occur especially after running around the house, and he often has to squat down to catch his breath. The patient was born at 38 weeks gestation following an uncomplicated pregnancy, in which the mother received full prenatal care. The patient is at the 35th percentile for length and below the 10th percentile for weight. While being examined, he starts to cry, and cyanosis is noted around the lips. Pulse oximetry on room air shows an oxygen saturation of 87%. Further evaluation will most likely reveal which of the following findings? &#160;

Accepted Answer

Decreased pulmonary markings on chest radiograph

Answer

Increased blood pressure in the arms

Answer

Fixed splitting of S2 on cardiac auscultation

Answer

Left axis deviation on electrocardiogram

Answer

Double aortic arch on magnetic resonance angiography

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Tetralogy of Fallot

Pathology

Cardiovascular system