Identify the heart condition that will cause profound cyanosis, shock, and congestive heart failure if the PDA closes
1. Truncus arteriosus
2. Total anomalous pulmonary venous return
3. Transposition of the greater vessels
4. ASD
2
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1. The truncal valve remains open, so these signs and symptoms will not be noted.
2. The PDA must remain open to allow the oxygen from the pulmonary veins to move to the left atrium.
3. Transposition causes cyanosis, but does not lead to shock.
4. An ASD does not lead to shock.
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