Table 5. Feasibilty of 2D ultrasound vs. live xPlane according to operator level.

First level operator	2D ultrasound	Live xPlane	P value
Four chamber-aortic arch	60/60 (100)	40/60 (66.6)	<0.001
Four chamber-ductal arch	60/60 (100)	41/60 (68.3)	<0.001

Note:

Data is presented as number (percentage).