A newborn presents with profound cyanosis, agitation, and increased respiratory rate. You listen to the heart and only hear a single second heart sound (no split) along with a faint crescendo-decrescendo murmur. Here is the CXR:
Challenge: What's the diagnosis?
1. With a larger obstruction, do you get a louder or fainter murmur?
2. What's seen on the CXR?
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