X-rays showing correction of malpositioning of intra-aortic balloon pump

Image A shows an x-ray in A-P projection shows the tip of the IABP (arrowhead) malpositioned in the aortic knob (arrow) near the origin of the left subclavian artery and well above the carina (asterisk).

Image B on the right shows the IABP (arrowhead) retracted to the level of the carina (asterisk), and at least 2 cm below the aortic knob (arrow).

IABP: intra-aortic balloon pump; A-P: anteroposterior.