The second edition of this handbook is an up-to-date guide to the application of catheter-based interventions across the entire  age range of congenital heart disease patients, from fetal life through to adulthood. It considers the changes and improvements that have occurred during the last few years in terms of new procedures, new tools and devices (in particular in the field of valves), new imaging and pre-procedural strategies,  such as 3D-printing, 3D- rotational angiography and fusion imaging. It provides readers with clear instructions on techniques for vascular access, valve dilatation, angioplasty, stent implantation, defect closure, defect creation, pulmonary valve implantation and on the hybrid approach, as well as on various other procedures. As in the first edition, topics are approached using a step-by-step format, ensuring that readers can immediately access the information relevant to their daily practice.