A 2-day-old newborn male is admitted to the pediatric intensive care unit with cyanosis and tachypnea. Cardiac ultrasound and MRI examinations reveal totally anomalous pulmonary connections. Which of the following embryologic events is responsible for this malformation?

Question

Accepted Answer

Abnormal septation of the sinus venosus

Answer

Abnormal development of the septum secundum

Answer

Abnormal development of the left sinus horn

Answer

Abnormal development of the coronary sinus

A 2-day-old newborn male is admitted to the pediatric intensive care unit with cyanosis and tachypnea. Cardiac ultrasound and MRI examinations reveal totally anomalous pulmonary connections. Which of the following embryologic events is responsible for this malformation?

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