ICU: LA trace in Junctional Rhythm vs. "Sinus" Rhythm

Patient #1:
Both panels are from the same patient with and without pacing.
Compare the LA traces between the two panels.

Patient #2:
What is the dominant wave in LA trace in this patient?
Correlate with EKG trace noted above.
(5 yr old, s/p Fontan...1 week postop after surgery to re-route hepatic vein to Fontan circuit secondary to pulmonary AVM)

Comment on the CVP trace. Why aren't there any waves?

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