Postop day#2 after RVOT patch (transannular).
Generally, doing well.
And, one day later...the same arterial line trace looks like this!!!
Possible explanations: (i) Papaverine was started or (ii) Tubing for the transducer was changed to a rigid, "pressure-tubing" (from a more compliant, "non-pressure" tubing).
This improvement in waveform may also occur when the arterial catheter is changed to a larger caliber.