6-hours old, term baby girl. 3.4 kg. Transferred from outside hospital for cyanosis noted at 2 hrs of age.
Oxygen saturation:
Preductal 100%
Postductal 81%
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgSC7Lt-OUCliCG5OfsB54fvAvET2BWj7UG2Q6qkf3K24rwmbYwFNVKK2r6wozKkyKODcIGtPurnSGLdIkWNFMrp_TlsA3mGhjV2TD117agr1F9n6VY3165NbmEbqUOCzORbAdWVQ/s400/ICUmonitorDiffCyanosisCoABailey.jpg)
Scenaio 2:
17 day old baby, born at home
Admitted via ER for cyanosis and respiratory distress.
Following is the monitor image:
"Reverse" Differential cyanosis is noted
Preductal saturation 87%
Postductal saturation 96%
What is the differential diagnosis?
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