The pre-procedure script is based on a script that three large prospective randomized trials found to be effective in adults in reducing anxiety, pain, and complications of invasive image-guided procedures. It has been modified for use in paediatrics. The standardized script containing relaxing and hypnoidal language with suggestions for coping strategies will be read by CDIU RNs trained in Comfort Talk in the pre-catheterization work-up area. The pre-extubation script contains suggestions for healing, recovery, functioning of bodily systems, and acknowledgement of the patient's contribution.